CN213327467U - Feeding unit of supercritical solvent deasphalting process system - Google Patents
Feeding unit of supercritical solvent deasphalting process system Download PDFInfo
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- CN213327467U CN213327467U CN202021557255.5U CN202021557255U CN213327467U CN 213327467 U CN213327467 U CN 213327467U CN 202021557255 U CN202021557255 U CN 202021557255U CN 213327467 U CN213327467 U CN 213327467U
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- deasphalting process
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Abstract
The utility model relates to a supercritical fluid deasphalting process systems feeding unit, it includes contains solid slurry oil feeding pipeline, feeding buffer tank, charge pump, return circuit pipeline and discharge line, contain the import of solid slurry oil feeding pipeline connection to feeding buffer tank, the bottom of feeding buffer tank sets up the discharge gate, and discharge line is connected to the discharge gate, is provided with the charge pump on the discharge line, and discharge line connects a return circuit pipeline, and return circuit pipeline connects back the feeding buffer tank. The utility model discloses a supercritical solvent deasphalting process systems feed unit can furthest make and contain solid slurry oil and can the intensive mixing, prevents the risk of solid jam pipeline and equipment in the thick liquids to make the raw materials application scope of taking off pitch company system further enlarge, strengthen its suitability and market competition.
Description
Technical Field
The utility model belongs to the technical field of residual oil upgrading system, especially a supercritical solvent deasphalting process systems feeding unit.
Background
The supercritical solvent deasphalting process is one residual oil modifying process for separating residual oil into high value deasphalted oil and low value deasphalted asphalt. It features wide raw material application range and can be used to prepare catalytic cracking and hydrocracking raw materials and various asphalt products. The technology is mature, the flow and the equipment are simple, and the investment and the operation cost are low.
The existing supercritical solvent deasphalting process does not consider slurry oil feed containing solids, such as solid catalytic slurry oil which needs to be treated when preparing needle coke. In order to prevent the pipeline from generating solid deposition, the problems of whether the solid phase of material liquid is uniformly mixed, whether the solid phase is precipitated and the like need to be considered. The feeding unit of the existing supercritical solvent deasphalting process system cannot solve the problems. Therefore, there is a need for an improved feed buffer system for the start-up in order to solve the above-mentioned problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's not enough, provide a supercritical solvent deasphalting process systems feed unit, effectively solve the liquid solid phase intensive mixing problem that contains solid slurry oil to prevent that pipeline and equipment from taking place the solid siltation, guarantee the stable production of low reaches device.
The utility model provides a its technical problem realize through following technical scheme:
a supercritical solvent deasphalting process system feeding unit is characterized in that: including containing solid oil thick liquid feed line, feeding buffer tank, charge pump, return circuit pipeline and discharge line, containing the import of solid oil thick liquid feed line connection to feeding buffer tank, the bottom of feeding buffer tank sets up the discharge gate, and discharge line is connected to the discharge gate, and the online charge pump that is provided with of discharge pipe, discharge line connection return circuit pipeline, return circuit pipeline connection return feeding buffer tank.
And, the feeding buffer tank internally mounted has the agitator, and the bottom of feeding buffer tank is the toper end.
And a second flow control valve is arranged on the discharge pipe line, a third flow control valve is controlled on the loop pipeline, and the reflux quantity of the loop pipeline is 20-30%.
And a filter and a first flow control valve are arranged on the solid-containing slurry feeding pipeline.
And a pressure control valve is arranged at the top of the feeding buffer tank.
Furthermore, the discharge line is connected to an asphalt separation system.
The utility model discloses an advantage and beneficial effect do:
1. the utility model discloses a supercritical fluid deasphalting process systems feed unit contains solid catalysis slurry oil and preheats behind the pumpable temperature (for example 150 ℃), pressurizes to 4barg, gets into the feeding buffer tank under the level control of feeding buffer tank, and the pressure of feeding buffer tank is maintained by fuel gas or nitrogen gas, and the top setting is by the pressure control valve, and the internal pressure of jar keeps to be 3.5 barg. Under the action of a stirrer of the feeding buffer tank, liquid and solid phases of the slurry are fully mixed to form stable oil-solid mixed slurry, the oil-solid mixed slurry is pressurized to the pressure required by a downstream system through a feeding pump and enters an asphalt separation system under the control of flow.
2. The utility model discloses a supercritical solvent deasphalting process systems feed unit, the setting of the toper end of the jar body can prevent that the solid in the thick liquids from taking place the siltation in the buffer tank, reduces tank inner space because the siltation increases, and space utilization descends, even blocks up the risk of bottom pipeline.
3. The utility model discloses a supercritical solvent deasphalting process systems feeding unit, oil-solid mixed slurry oil are for containing solid feeding, and at this moment, the charge pump must keep the operation that lasts, and keeps 20% -30% return flow, so just can guarantee not contain any solid deposition point in the pipeline return circuit, consequently, adopt to set up on the discharging pipeline second flow control valve, return circuit pipeline and control the third flow control valve, the return flow of return circuit pipeline is 20-30%'s mode.
4. The utility model discloses a supercritical solvent deasphalting process systems feed unit contains and is provided with the filter on the solid slurry oil inlet pipeline, filters the large granule solid, further reduces pipeline abrasion and blocks up the risk.
5. The utility model discloses a supercritical solvent deasphalting process systems feed unit can furthest make and contain solid slurry oil and can the intensive mixing, prevents the risk of solid jam pipeline and equipment in the thick liquids to make the raw materials application scope of taking off pitch company system further enlarge, strengthen its suitability and market competition.
Drawings
Fig. 1 is a flow chart of the system of the present invention.
Reference numerals:
1-solid-containing oil slurry feeding pipeline, 2-first flow control valve, 3-liquid level sensor, 4-conical bottom, 5-discharging pipeline, 6-feeding pump, 7-second flow control valve, 8-third flow control valve, 9-loop pipeline, 10-feeding buffer tank, 11-stirrer, 12-pressure control valve and 13-filter.
Detailed Description
The present invention will be described in further detail with reference to specific examples, which are provided for illustrative purposes only, and are not intended to be limiting, and the scope of the present invention should not be limited thereby.
The utility model provides a supercritical solvent deasphalting process systems feeding unit, it includes contains solid oil thick liquid feed line 1, feeding buffer tank 10, charge pump 6, return circuit pipeline 9 and discharge pipeline 5, contains solid oil thick liquid feed line connection to the import of feeding buffer tank, and the bottom of feeding buffer tank sets up the discharge gate, and discharge pipeline is connected to the discharge gate, is provided with the charge pump on the discharge pipe line, and discharge pipeline connects a return circuit pipeline, and return circuit pipeline connects back the feeding buffer tank. The feeding buffer tank is internally provided with a stirrer 11, and the bottom of the feeding buffer tank is a conical bottom 4. The return flow of the circuit line is 20-30%. A filter 13 is arranged on the solid-containing slurry feeding pipeline. The discharge pipeline is connected with the asphalt separation system. The solid-containing oil slurry feeding pipeline is provided with a first flow control valve 2, and the flow of the first flow control valve is controlled according to the signal of a liquid level sensor 3 in the feeding buffer tank. The top of the feed buffer tank is provided with a pressure control valve 12. A second flow control valve 7 is arranged on the discharge pipe line, and a third flow control valve 8 is controlled on the loop line.
The working process of the feeding unit of the supercritical solvent deasphalting process system is as follows:
after preheating the solids-containing catalytic slurry to a pumpable temperature (e.g., 150 c), it is pumped to 4barg (not shown in the figure) and fed into a feed buffer tank under level control. The pressure in the feed buffer tank was maintained by fuel gas or nitrogen, a pressure control valve was placed at the top and the pressure in the tank was maintained at 3.5 barg. Under the action of the stirrer of the feeding buffer tank, the liquid and the solid are fully mixed to form stable oil-solid mixed slurry which is a suspension containing solid and liquid. And the conical bottom of the tank body can prevent the solid in the slurry from silting up in the buffer tank. The risk that the space utilization rate of the tank is reduced and even a bottom pipeline is blocked due to the increase of sludge in the tank space is reduced.
The oil-solid slurry mixture then passes through a feed pump, where it is noted that the feed pump must be kept running continuously while the feed is solids-laden, and at a 20% to 30% reflux rate, to ensure that the line loop does not contain any solids deposit points. On the basis, the materials are pressurized to the pressure required by a downstream system through a feed pump and enter an asphalt separation system under the flow control.
The feeding unit of the supercritical solvent deasphalting process system can fully mix the solid-containing oil slurry to the maximum extent and prevent the risk that the solid in the slurry blocks pipelines and equipment. The successful application of the feeding system further expands the raw material application range of the deasphalting device and enhances the market competitiveness of the deasphalting device.
Although the embodiments of the present invention and the accompanying drawings have been disclosed for illustrative purposes, those skilled in the art will appreciate that various substitutions, alterations, and modifications are possible without departing from the spirit and scope of the invention and the appended claims, and thus the scope of the invention is not limited to the embodiments and drawings disclosed.
Claims (5)
1. A supercritical solvent deasphalting process system feeding unit is characterized in that: the solid-containing oil slurry feeding device comprises a solid-containing oil slurry feeding pipeline, a feeding buffer tank, a feeding pump, a loop pipeline and a discharging pipeline, wherein the solid-containing oil slurry feeding pipeline is connected to an inlet of the feeding buffer tank, a discharging port is formed in the bottom of the feeding buffer tank and is connected with the discharging pipeline, the feeding pump is arranged on the discharging pipeline, the discharging pipeline is connected with the loop pipeline, and the loop pipeline is connected back to the feeding buffer tank; the feeding buffer tank is internally provided with a stirrer, and the bottom of the feeding buffer tank is a conical bottom.
2. The supercritical solvent deasphalting process system feed unit of claim 1, characterized by: the discharge pipe line is provided with a second flow control valve and a loop line is provided with a third flow control valve, and the return flow of the loop line is 20-30%.
3. The supercritical solvent deasphalting process system feed unit of claim 1, characterized by: and a filter and a first flow control valve are arranged on the solid-containing oil slurry feeding pipeline.
4. The supercritical solvent deasphalting process system feed unit of claim 1, characterized by: and a pressure control valve is arranged at the top of the feeding buffer tank.
5. The supercritical solvent deasphalting process system feed unit of claim 1, characterized by: the discharge pipeline is connected with the asphalt separation system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021557255.5U CN213327467U (en) | 2020-07-31 | 2020-07-31 | Feeding unit of supercritical solvent deasphalting process system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021557255.5U CN213327467U (en) | 2020-07-31 | 2020-07-31 | Feeding unit of supercritical solvent deasphalting process system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213327467U true CN213327467U (en) | 2021-06-01 |
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Family Applications (1)
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| CN202021557255.5U Active CN213327467U (en) | 2020-07-31 | 2020-07-31 | Feeding unit of supercritical solvent deasphalting process system |
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| CN (1) | CN213327467U (en) |
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- 2020-07-31 CN CN202021557255.5U patent/CN213327467U/en active Active
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