CN212941597U

CN212941597U - Feeding degassing system

Info

Publication number: CN212941597U
Application number: CN202021670179.9U
Authority: CN
Inventors: 刘哲; 吕云飞; 王鑫; 昝大鑫; 邓宏达
Original assignee: Zhangjiagang Free Trade Zone Huixin Chemical Technology Co ltd
Current assignee: Zhangjiagang Free Trade Zone Huixin Chemical Technology Co ltd
Priority date: 2020-08-12
Filing date: 2020-08-12
Publication date: 2021-04-13
Anticipated expiration: 2030-08-12

Abstract

The application discloses feeding degasification system relates to suspension bed hydrogenation technical field. The application the feeding degasification system set up in compounding jar top, include: the steam ejector is provided with an air inlet pipe, the air inlet pipe is used for introducing high-pressure steam into the steam ejector, and the high-pressure steam expands in the steam ejector to generate negative pressure; and one end of the degassing pipe is connected with the steam ejector, and the other end of the degassing pipe is connected with the top of the mixing tank and used for extracting gas in the mixing tank. This application is connected with the compounding jar through setting up steam ejector, behind the inflow high pressure steam in steam ejector, high pressure steam inflation production negative pressure in steam ejector, takes out the gas in with the compounding jar through the degasification pipe to solve among the prior art problem that the air in the compounding jar is difficult to the exhaust, reduce or eliminate the bubble in the solid-liquid mixture feeding, avoid producing the condition of channel blockage.

Description

Feeding degassing system

Technical Field

The application relates to the technical field of suspension bed hydrogenation, in particular to a feeding degassing system.

Background

The suspension bed hydrocracking technology is a hydrocracking technology, and can convert heavy oil into light fuel oil such as gasoline and diesel oil which can be sold in the market. Slurry feeding, namely solid-liquid mixed feeding, is adopted in the suspended bed reactor. The liquid phase is heavy oil needing 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. The feed needs to ensure homogeneous solid-liquid distribution.

The existing mixing tank is generally designed with a stirrer, and after the feeding is fully and uniformly stirred in the mixing tank, the feeding enters a downstream suspension bed reaction system through pressurization of a tank bottom feeding pump. The mixing tank in the prior art is designed to be micro-positive pressure without considering a degassing system. However, in actual operation, two situations often occur:

1) instruments on the top of the mixing tank, such as a liquid level meter, a pressure gauge, a thermometer and the like, are prone to failure, and instrument interfaces are blocked and cannot be cleaned on line;

2) the feeding pump at the bottom of the mixing tank frequently generates the conditions of cavitation, pump stopping and the like.

For analysis reasons, the solid-phase feeding material carries certain air, the heavy oil in the liquid-phase feeding material has high viscosity, the air is difficult to be discharged automatically, the phenomenon of gas-in-oil is easy to form, even if the solid-liquid feeding material is stirred, bubbles in a solid-liquid mixture are difficult to eliminate, so that channels such as instruments and pipelines at the top and the bottom of a material mixing tank are blocked, and the whole process of hydrocracking of a suspension bed is further influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a feeding degasification system, the problem that the air in the compounding jar is difficult to the exhaust among the solution prior art reduces or eliminates the bubble in the solid-liquid mixture feeding, avoids producing the condition of channel blockage.

In order to achieve the above purpose, the embodiments of the present application adopt the following technical solutions: a feeding and degassing system is arranged above a mixing tank, the mixing tank is used for mixing solid-phase feeding and liquid-phase feeding, the solid-phase feeding enters the mixing tank through a hopper, and the liquid-phase feeding enters the mixing tank through an oil inlet pipe; the feed degassing system comprises: the steam ejector is provided with an air inlet pipe, the air inlet pipe is used for introducing high-pressure steam into the steam ejector, and the high-pressure steam expands in the steam ejector to generate negative pressure; and one end of the degassing pipe is connected with the steam ejector, and the other end of the degassing pipe is connected with the top of the mixing tank and used for extracting gas in the mixing tank.

In above-mentioned technical scheme, this application embodiment is connected with the compounding jar through setting up steam ejector, behind the inflow high-pressure steam in steam ejector, high-pressure steam expands in steam ejector and produces the negative pressure, takes out the gas in the compounding jar through the degasification pipe to solve the problem that the air in the compounding jar is difficult to discharge among the prior art, reduce or eliminate the bubble in the solid-liquid mixture feeding, avoid producing the condition of channel blocking.

Further, according to the embodiment of the application, the feed degassing system further comprises a washing tank, the degassing pipe is divided into a first degassing pipe and a second degassing pipe, the first degassing pipe is arranged between the washing tank and the mixing tank, and the second degassing pipe is arranged between the washing tank and the steam injector.

Further, according to the embodiment of the application, an oil inlet branch pipe is arranged on the oil inlet pipe and connected with the washing tank; the distributor is arranged in the washing tank.

Further, according to the embodiment of the application, a heavy oil recovery pipe is arranged at the bottom of the washing tank, and the heavy oil recovery pipe is connected with the mixing tank.

Further, according to the embodiment of the application, wherein, a pressure adjusting pipeline is arranged on the air inlet pipe, the pressure adjusting pipeline is communicated with the degassing pipe, and the pressure adjusting pipeline is used for adjusting the pressure in the steam ejector.

Further in accordance with an embodiment of the present application, wherein the feed degassing system further has a cooler, the cooler is in communication with the steam ejector.

Further, according to the embodiment of the present application, the feed degassing system further comprises a liquid separation tank, wherein the liquid separation tank is communicated with the steam ejector and is used for separating the gas discharged from the steam ejector into a liquid phase substance, an oil phase substance and a gas phase substance.

Further, according to this application embodiment, wherein, the knockout drum lower extreme is provided with blowdown oil pipe, is provided with dirty oil pump on the blowdown oil pipe for discharge the oil phase material in the knockout drum.

Further, according to this application embodiment, wherein, the knockout drum lower extreme is provided with sewage pipe, is provided with the sewage pump on the sewage pipe for discharge the liquid phase material in the knockout drum.

Further, according to this application embodiment, wherein, divide the jar top and be provided with the water-sealed jar, the water-sealed jar communicates with divide the jar, and the gaseous phase material in the jar of dividing drains to the water-sealed jar.

Compared with the prior art, the method has the following beneficial effects: this application is connected with the compounding jar through setting up steam ejector, behind the inflow high pressure steam in steam ejector, high pressure steam inflation production negative pressure in steam ejector, takes out the gas in with the compounding jar through the degasification pipe to solve among the prior art problem that the air in the compounding jar is difficult to the exhaust, reduce or eliminate the bubble in the solid-liquid mixture feeding, avoid producing the condition of channel blockage.

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 feed degassing system of the present application.

In the attached drawings

1. Hopper 2, mixing tank 3 and oil inlet pipe

31. Liquid level meter I32, control valve I33 and oil inlet branch pipe

34. Control valve II 35, flowmeter I4 and steam ejector

41. Air inlet pipe 42, flow meter II 43 and control valve III

44. Pressure gauge 45, control valve IV 5 and washing tank

51. Heavy oil recovery pipe 52, control valve five 53 and liquid level meter two

6. Degassing pipe I7, degassing pipe II 8 and cooler

9. Liquid separating tank 10, sewage discharging oil pipe 101 and sewage oil pump

102. Three liquid level meters 103, six control valves 11 and sewage discharge pipe

111. Sewage pump 112, level meter four 113 and control valve seven

12. Water sealed tank 13, skimming pipe 131 and control valve eight

132. Liquid level meter five

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.

FIG. 1 is a schematic diagram of a feed degassing system according to the present application. As shown in fig. 1, a feed degassing system of the type described herein is disposed above a mixing bowl 2. Wherein, a hopper 1 is arranged above the mixing tank 2 and used for solid phase feeding. An oil inlet pipe 3 is arranged below the hopper 1 and used for liquid-phase feeding, and solid and liquid are conveyed into the mixing tank 2 together after being primarily mixed and are stirred and mixed. Be provided with control valve 32 on advancing oil pipe 3, and be provided with level gauge 31 on the lateral wall of compounding jar 2, level gauge 31 and control valve 32 intercommunication, the flow of advancing the interior liquid phase feeding of oil pipe 3 through the level control of compounding jar 2.

In order to achieve the above-mentioned degassing of the mixing bowl 2, the feed degassing system comprises a steam injector 4 and a washing bowl 5, the washing bowl 5 being connected to the top of the mixing bowl 2 via a first degassing conduit 6, the steam injector 4 and the washing bowl 5 being previously connected via a second degassing conduit 7. The steam injector 4 has an inlet pipe 41 for flowing high-pressure steam into the steam injector 4. High-pressure steam expands in the steam ejector 4 to generate negative pressure, and the gas in the mixing tank 2 is pumped out sequentially through the degassing pipe II 7, the washing tank 5 and the degassing pipe I6, so that the problem that the air in the mixing tank 2 is difficult to discharge in the prior art is solved, bubbles in solid-liquid mixing feeding are reduced or eliminated, and the condition of channel blockage is avoided.

Wherein the gas withdrawn from the mixing tank 2 washes out gas-entrained solid particles and heavy oil droplets in a washing tank 5. Specifically, an oil inlet branch pipe 33 is arranged on the oil inlet pipe 3, the oil inlet branch pipe 33 is connected with the washing tank 5, and a part of liquid-phase feeding is separated and conveyed into the washing tank 5. The distributor is arranged in the washing tank 5, and can break up the liquid-phase feeding material in the washing tank 5 to make the liquid-phase feeding material in a dispersed water drop shape or a mist shape, and further wash the gas in the washing tank 5. The scrubbed gas is discharged from the top of the scrubber tank 5 into the second degassing tube 7, and the scrubbed liquid-phase feed is deposited at the bottom of the scrubber tank 5. The bottom of the washing tank 5 is provided with a heavy oil recovery pipe 51, the heavy oil recovery pipe 5 is connected with the mixing tank 2, and the liquid phase feed at the bottom of the washing tank 5 is recovered into the mixing tank 2.

In contrast, in the above technical solution, the first flow meter 35 and the second control valve 34 are arranged on the oil inlet branch pipe 33, and the first flow meter 35 is communicated with the second control valve 34 to control the flow rate of the liquid phase feed in the oil inlet branch pipe 33.

In the above-described embodiment, the heavy oil recovery pipe 51 is provided with the control valve five 52, the side wall of the washing tank 5 is provided with the level gauge two 53, the level gauge two 53 and the control valve five 52 are communicated, and the flow rate of the heavy oil recovery pipe 51 is controlled according to the liquid level in the washing tank 5.

Next, the intake pipe 41 is provided with a second flow meter 42 and a third control valve 43, and the second flow meter 42 is communicated with the third control valve 43 to control the flow rate of the steam in the intake pipe 41.

In addition, the air inlet pipe 41 is also provided with a pressure adjusting pipeline, the pressure adjusting pipeline is communicated with the second degassing pipe 7, and part of steam is input into the second degassing pipe 7 to realize pressure adjustment of the steam ejector 4. Specifically, a control valve IV 45 is arranged on the pressure regulating pipeline, a pressure gauge 44 is arranged on the degassing pipe II 7, and the pressure gauge 44 is communicated with the control valve IV 45.

Finally, after the degassing is performed in the degassing system, further treatment of the steam and the non-condensable gas discharged from the steam ejector 4 is required. Specifically, the outlet of the steam ejector 4 is connected to a cooler 8, and is cooled by the cooler 8 and sent to a liquid separation tank 9. In the separation tank 9, separation of the gas phase, the liquid phase and the oil phase is achieved in the separation tank 9.

Wherein, the lower end of the liquid separation tank 9 is provided with a sewage discharge oil pipe 10, and the sewage discharge oil pipe 10 is used for discharging oil phase substances in the liquid separation tank 9. The sewage oil pump 101 and the control valve six 103 are arranged on the sewage oil pipe 10, the liquid level meter three 102 is arranged at one end of the liquid separation tank 9, and the liquid level meter three 102 is communicated with the control valve six 103 to control the flow in the sewage oil pipe 10.

The lower end of the liquid separation tank 9 is also provided with a sewage discharge pipe 11, and the sewage discharge pipe 11 is used for discharging liquid phase substances in the liquid separation tank 9. The sewage discharge pipe 11 is provided with a sewage pump 111 and a control valve seven 113, the other end of the liquid separation tank 9 is provided with a liquid level meter four 112, and the liquid level meter four 112 is communicated with the control valve seven 113 to control the flow in the sewage discharge pipe 11.

A water-sealed tank 12 is provided above the liquid separation tank 9, the water-sealed tank 12 communicates with the liquid separation tank 9, and the gas phase substance in the liquid separation tank 9 is discharged to the water-sealed tank 12. The water-sealed tank 12 contains water at a sufficiently high level to prevent external gas from entering the degassing system. And a skimming pipe 13 is arranged at the lower end of the water-sealed tank 12, the skimming pipe 13 is communicated with the liquid separating tank 9, and oil accumulated in the water-sealed tank 12 is skimmed and discharged into the liquid separating tank 9. The control valve eight 131 is arranged on the oil skimming pipe 13, the liquid level meter five 132 is arranged on the side wall of the water seal tank 12, the liquid level meter five 132 is communicated with the control valve eight 131, and the flow of the oil skimming pipe 13 is controlled through the liquid level in the water seal tank 12.

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

1. The feeding and degassing system is characterized in that the feeding and degassing system is arranged above a mixing tank, the mixing tank is used for mixing solid-phase feeding and liquid-phase feeding, the solid-phase feeding enters the mixing tank through a hopper, and the liquid-phase feeding enters the mixing tank through an oil inlet pipe; the feed degassing system comprises:

the steam ejector is provided with an air inlet pipe, the air inlet pipe is used for introducing high-pressure steam into the steam ejector, and the high-pressure steam expands in the steam ejector to generate negative pressure;

and one end of the degassing pipe is connected with the steam ejector, and the other end of the degassing pipe is connected with the top of the mixing tank and used for extracting gas in the mixing tank.

2. A feed degassing system according to claim 1 further comprising a wash tank, said degassing tube being divided into a first degassing tube and a second degassing tube, said first degassing tube being disposed between said wash tank and said mixing tank, said second degassing tube being disposed between said wash tank and said steam injector.

3. The feed degassing system of claim 2 wherein said feed inlet pipe is provided with a feed inlet manifold, said feed inlet manifold being connected to said scrubbing tank; and a distributor is arranged in the washing tank.

4. A feed degassing system according to claim 2 wherein said wash tank is provided at its bottom with a heavy oil recovery pipe, said heavy oil recovery pipe being connected to said blending tank.

5. A feed degassing system according to claim 1, wherein said gas inlet pipe is provided with a pressure regulating conduit, said pressure regulating conduit communicating with said degassing tube, said pressure regulating conduit being adapted to regulate the pressure within said steam injector.

6. A feed degassing system according to claim 1 further comprising a cooler in communication with said steam ejector.

7. A feed degassing system according to claim 1 further comprising a knock-out drum in communication with said vapor ejector for separating the gas discharged from the vapor ejector into liquid phase species, oil phase species and gas phase species.

8. A feed degassing system as claimed in claim 7, wherein a blowdown oil pipe is provided at a lower end of said liquid separation tank, and a dirty oil pump is provided on said blowdown oil pipe for discharging the oil phase material in said liquid separation tank.

9. A feeding and degassing system as claimed in claim 7, wherein a sewage pipe is provided at a lower end of said liquid separating tank, and a sewage pump is provided on said sewage pipe for discharging liquid phase substances in said liquid separating tank.

10. The feed degassing system of claim 7 wherein a water-sealed tank is disposed above said liquid separation tank, said water-sealed tank is in communication with said liquid separation tank, and gas phase materials in said liquid separation tank are discharged to said water-sealed tank.