CN211987170U

CN211987170U - Oil-gas separation stabilizing system on top of pressure reduction tower

Info

Publication number: CN211987170U
Application number: CN202020675877.1U
Authority: CN
Inventors: 田兆勇; 刘麦林; 李磊磊; 王春军; 刘龙泉; 左键东; 刘金帅; 牛帅帅; 孙延国; 周平平
Original assignee: Shandong Dongfang Hualong Industrial And Trade Group Co ltd
Current assignee: Shandong Dongfang Hualong Industrial And Trade Group Co ltd
Priority date: 2020-04-28
Filing date: 2020-04-28
Publication date: 2020-11-24
Anticipated expiration: 2030-04-28

Abstract

The utility model discloses a decompression top of tower oil-gas separation stable system, including the one-level evacuator, second grade evacuator and tertiary evacuator, the one-level evacuator, the liquid phase export of second grade evacuator and tertiary evacuator respectively with the one-level condenser, the access connection of second grade condenser and tertiary condenser, the one-level condenser, the bottom liquid phase export of second grade condenser and tertiary condenser is equipped with one-level oil and gas separator respectively, second grade oil and gas separator and tertiary oil and gas separator, the gaseous phase export and the second grade evacuator access connection of one-level oil and gas separator, second grade oil and gas separator's gaseous phase export and tertiary evacuator access connection, first grade oil and gas separator, the liquid phase export of second grade oil and gas separator and tertiary oil and gas separator bottom respectively with subtract top oil water one-level separator access connection. The utility model discloses can carry out thorough separation with the oil gas after the condenser cooling to alleviate the load of evacuator, improve the cooling effect, can stabilize the vacuum at the top of the tower.

Description

Oil-gas separation stabilizing system on top of pressure reduction tower

Technical Field

The utility model relates to a petroleum refining technical field, concretely relates to pressure reducing tower top oil-gas separation stable system.

Background

In the existing petroleum refining process, a pressure reducing tower is needed, oil gas at the top of the pressure reducing tower is not completely cooled after entering a condenser, and after entering the condenser, the oil gas cannot be completely cooled due to negative pressure in the condenser and is pumped to subordinate equipment by an evacuator, so that the load of the subordinate evacuator is increased, steam is entrained by the delivered oil gas, the subsequent process is affected, and the tower top vacuumizing is not facilitated.

Disclosure of Invention

The utility model aims at providing a can improve the cooling effect to the defect that prior art exists, alleviate the evacuator load, stabilize production system's decompression top of tower oil-gas separation stable system.

The technical scheme of the utility model is that: the oil-gas separation and stabilization system comprises a first-stage evacuator, a second-stage evacuator and a third-stage evacuator, wherein steam inlets of the first-stage evacuator, the second-stage evacuator and the third-stage evacuator are respectively connected with a steam pipeline, liquid phase outlets of the first-stage evacuator, the second-stage evacuator and the third-stage evacuator are respectively connected with inlets of a first-stage condenser, a second-stage condenser and a third-stage condenser through pipelines, top outlets of the first-stage condenser, the second-stage condenser and the third-stage condenser are connected with a circulating water pipeline, bottom liquid phase outlets of the first-stage condenser, the second-stage condenser and the third-stage condenser are respectively provided with a first-stage oil-gas separator, a second-stage oil-gas separator and a third-stage oil-gas separator, a gas phase outlet of the first-stage oil-gas separator is connected with an inlet of the second-, liquid phase outlets at the bottoms of the primary oil-gas separator, the secondary oil-gas separator and the tertiary oil-gas separator are respectively connected with an inlet of the top-reducing oil-water primary separator through pipelines.

Preferably, a sewage outlet at the bottom of the reduced-roof oil-water primary separator is connected with a reduced-roof sewage pipeline through a reduced-roof drainage pump.

Preferably, a reduced-ceiling oil outlet at the bottom of the reduced-ceiling oil-water primary separator is connected with a diesel oil pipeline through a reduced-ceiling primary oil pump.

Preferably, the evacuator is a steam jet evacuator.

Preferably, a top gas phase outlet of the three-stage oil-gas separator is connected with a compressor or a low-pressure gas pipe network.

Preferably, the primary oil-gas separator, the secondary oil-gas separator and the tertiary oil-gas separator all include a tank body, a liquid inlet and a gas outlet have been seted up to the upper end of the tank body, the oil-out has been seted up to the lower extreme of the tank body, be connected with the flowmeter on the oil-out, the internal fixedly connected with hollow frame of jar, the hollow frame is located the below of gas outlet, just the gas outlet intercommunication hollow frame, the bottom fixedly connected with perforated plate of hollow frame, the intussuseption of hollow frame is filled with the filler, the inside upper end fixedly connected with baffle of the tank body, the baffle is located one side of hollow frame, the internal fixedly connected with level gauge of tank, the level gauge upper end is less than the bottom.

Preferably, the lower end of the perforated plate is provided with a spike towards the bottom of the tank body for dropping oil.

Compared with the prior art, the utility model, have following advantage: the oil-gas separator is arranged at the outlet of the condenser, so that oil gas cooled by the condenser can be thoroughly separated, the load of the evacuator can be reduced through multi-stage condensation and vacuumizing, the cooling effect is improved, and the vacuum degree of the top of the tower can be stabilized.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of an oil-gas separator;

in the figure: 1. the device comprises a primary evacuator, a secondary evacuator, a tertiary evacuator, a steam pipeline, a primary condenser, a secondary condenser, a tertiary condenser, a circulating water pipeline, a secondary oil-gas separator, a tertiary condenser, a secondary condenser, a circulating water pipeline, a secondary oil-gas separator, a secondary liquid-gas separator.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

Example one

Referring to fig. 1, the oil-gas separation stabilizing system at the top of the vacuum tower comprises a primary evacuator 1, a secondary evacuator 2 and a tertiary evacuator 3. The steam inlets of the first-stage vacuum pump 1, the second-stage vacuum pump 2 and the third-stage vacuum pump 3 are respectively connected with a steam pipeline 4, the first-stage vacuum pump 1, the second-stage vacuum pump 2 and the third-stage vacuum pump 3 are all steam jet vacuum pumps, vacuum pumping is achieved through the steam jet vacuum pumps, and oil gas is sequentially pumped into the condenser. Liquid phase outlets of the first-stage evacuator 1, the second-stage evacuator 2 and the third-stage evacuator 3 are respectively connected with inlets of a first-stage condenser 5, a second-stage condenser 6 and a third-stage condenser 7 through pipelines, top outlets of the first-stage condenser 5, the second-stage condenser 6 and the third-stage condenser 7 are connected with a circulating water pipeline 8, water condensed through the condensers enters the circulating water pipeline 8 for recycling, bottom liquid phase outlets of the first-stage condenser 5, the second-stage condenser 6 and the third-stage condenser 7 are respectively provided with a first-stage oil-gas separator 9, a second-stage oil-gas separator 10 and a third-stage oil-gas separator 11, condensed oil and gas can be subjected to gas-liquid separation through the oil-gas separators, a gas phase outlet of the first-stage oil-gas separator 9 is connected with an inlet of the second-stage evacuator 2 through a pipeline, a gas phase outlet of, Liquid phase outlets at the bottoms of the secondary oil-gas separator 10 and the tertiary oil-gas separator 11 are respectively connected with an inlet of the top-reducing oil-water primary separator 12 through pipelines, and a top gas phase outlet of the tertiary oil-gas separator 11 is connected with a compressor or a low-pressure gas pipe network. The liquid phase enters the top-reducing oil-water first-stage separator 12 through a pipeline to be continuously separated, and the gas phase is respectively pumped into a lower-stage condenser through the second-stage evacuator 2 and the third-stage evacuator 3 to be cooled again, so that the load of the lower-stage evacuator is reduced, a good cooling effect is achieved, and meanwhile, the vacuum degree at the top of the tower is ensured to be stabilized above-99 KPa.

The sewage outlet at the bottom of the top-reducing oil-water primary separator 12 is connected with a top-reducing sewage pipeline 14 through a top-reducing drainage pump 13. The reduced-ceiling oil outlet at the bottom of the reduced-ceiling oil-water first-stage separator 13 is connected with a diesel pipeline 16 through a reduced-ceiling first-stage oil pump 15. Meanwhile, the top of the tower is provided with a reduced-overhead oil inlet and a noncondensable gas outlet.

Example two

The difference from the first embodiment is that, as shown in fig. 2, the primary oil-gas separator 9, the secondary oil-gas separator 10, and the tertiary oil-gas separator 11 each include a tank 17, a liquid inlet and a gas outlet 21 are formed in an upper end of the tank 17, an oil outlet 18 is formed in a lower end of the tank 17, a flow meter 19 is connected to the oil outlet 18, a hollow frame 20 is fixedly connected in the tank 17, the hollow frame 20 is located below the gas outlet 21, the gas outlet 21 is communicated with the hollow frame 20, a perforated plate 22 is fixedly connected to a bottom end of the hollow frame 20, a filler 23 is filled in the hollow frame 20, and the filler 23 is a ceramic filler. The inside upper end fixedly connected with baffle 24 of jar body 17, baffle 24 are located one side of cavity frame 20, the internal fixedly connected with level gauge 25 of jar body 17, the level gauge 25 upper end is less than the bottom of baffle 24. During operation, gas collides with the baffle 24 in the flowing process, and along with the continuous passing of oil, the introduced gas pushes the gas in the tank body 17 to flow, so that the internal gas passes through the bottom end of the baffle 24 at an accelerated speed, enters the hollow frame 20 and contacts the filler 23, and petroleum liquid in the filtering gas is filtered, and the discharge of petroleum liquid drops is avoided.

In addition, the lower end of the perforated plate 22 is provided with a spike 26 for dropping oil toward the bottom of the tank 17.

When the device is used, the top-reducing oil gas firstly enters a first-stage condenser 5 for condensation through a first-stage evacuator 1, the condensed oil gas enters a first-stage oil-gas separator 9 for oil-gas separation, the separated gas enters a second-stage condenser 6 for condensation through a second-stage evacuator 2, the separated gas also enters a second-stage oil-gas separator 10 for oil-gas separation, the separated gas enters a third-stage condenser 7 for condensation through a third-stage evacuator 3, and finally the gas is subjected to oil-gas separation through a third-stage oil-gas separator 11, the gas enters a compressor or a low-pressure gas pipeline network, and the oil liquid separated from the first-stage oil-gas separator 9, the second-stage oil-gas separator 10 and the third-stage oil-gas separator 11 enters a top-reducing oil-water first-stage separator 12 for storage, so that the load of the lower-stage evacua. And further separation is carried out, after separation, sewage enters a top reduction sewage pipeline 14 through a top reduction drainage pump 13, and diesel enters a diesel pipeline 16 through a top reduction primary oil pump 15. The gas phase is cooled by a multistage condenser, and the gas and the liquid are thoroughly separated by a multistage oil-gas separator, so that the load of the evacuator can be reduced, and the cooling effect is ideal.

The present invention is not limited to the above-described embodiments, and various changes can be made within the knowledge range of those skilled in the art without departing from the spirit of the present invention, and the changed contents still belong to the protection scope of the present invention.

Claims

1. The oil-gas separation and stabilization system at the top of the vacuum tower is characterized by comprising a first-stage evacuator, a second-stage evacuator and a third-stage evacuator, wherein steam inlets of the first-stage evacuator, the second-stage evacuator and the third-stage evacuator are respectively connected with a steam pipeline, liquid phase outlets of the first-stage evacuator, the second-stage evacuator and the third-stage evacuator are respectively connected with inlets of a first-stage condenser, a second-stage condenser and a third-stage condenser through pipelines, top outlets of the first-stage condenser, the second-stage condenser and the third-stage condenser are connected with a circulating water pipeline, bottom liquid phase outlets of the first-stage condenser, the second-stage condenser and the third-stage condenser are respectively provided with a first-stage oil-gas separator, a second-stage oil-gas separator and third-stage oil, a gas-gas separator outlet of the first-stage oil-gas separator is connected with an inlet, liquid phase outlets at the bottoms of the primary oil-gas separator, the secondary oil-gas separator and the tertiary oil-gas separator are respectively connected with an inlet of the top-reducing oil-water primary separator through pipelines.

2. The vacuum column top oil-gas separation stabilization system of claim 1, wherein: and a sewage outlet at the bottom of the top-reducing oil-water primary separator is connected with a top-reducing sewage pipeline through a top-reducing drainage pump.

3. The vacuum column top oil-gas separation stabilization system of claim 2, wherein: and a reduced-ceiling oil outlet at the bottom of the reduced-ceiling oil-water primary separator is connected with a diesel oil pipeline through a reduced-ceiling primary oil pump.

4. The vacuum column top oil-gas separation stabilization system of claim 2, wherein: the evacuator is a steam jet evacuator.

5. The vacuum column top oil-gas separation stabilization system of claim 3 or 4, wherein: and a gas phase outlet at the top of the three-stage oil-gas separator is connected with a compressor or a low-pressure gas pipe network.

6. The vacuum column top oil-gas separation stabilization system of claim 5, wherein: the primary oil-gas separator, the secondary oil-gas separator and the tertiary oil-gas separator all comprise a tank body, a liquid inlet and a gas outlet are formed in the upper end of the tank body, a fuel outlet is formed in the lower end of the tank body, a flow meter is connected to the fuel outlet, a hollow frame is fixedly connected in the tank body and located below the gas outlet, the gas outlet is communicated with the hollow frame, a perforated plate is fixedly connected to the bottom end of the hollow frame, a filler is filled in the hollow frame, a baffle is fixedly connected to the upper end of the inside of the tank body and located on one side of the hollow frame, a liquid level meter is fixedly connected in the tank body, and the upper end of the liquid level meter is lower than the.

7. The vacuum column top oil-gas separation stabilization system of claim 6, wherein: the lower extreme of foraminiferous plate is equipped with the spine that is used for dripping fluid towards jar body bottom.