CN215233827U - Fuel oil blending system - Google Patents

Abstract

A fuel oil blending system belongs to the technical field of fuel oil blending. In the dye oil preparation method, a high-sulfur residual oil blending low-added-value oil blending mode mostly adopts tank blending, each component oil is mixed and added into a tank, the residual oil and the thin oil are uniformly mixed by adopting methods such as pump circulation, electric stirring and the like, and the blending mode consumes long time and has poor mixing effect because the viscosity difference between the residual oil and the thin oil is large. The fuel oil blending system can mix catalytic slurry oil and catalytic diesel oil uniformly firstly and then blend the catalytic slurry oil and the catalytic diesel oil with normal residual oil, and simultaneously introduces a mixing method of matching a static mixer and an ultrasonic mixer, utilizes a downstream-upstream ultrasonic mixer, is applied to mixing and stirring, can obviously improve the mixing efficiency and the mixing quality, has lower energy consumption of each device, is simpler to modify the traditional production line, and has lower cost of each device.

Description

Fuel oil blending system

Technical Field

A fuel oil blending system belongs to the technical field of fuel oil blending.

Background

The domestic low-sulfur heavy marine fuel oil has two production processes, one is the direct production of low-sulfur and slag-reducing, and the other is the production of high-sulfur residual oil by hydrofining, and then the low-added-value products, such as catalytic cracking slurry oil, catalytic cycle oil, catalytic diesel oil, ethylene diesel oil, coker gas oil and other heavy raw materials, are blended.

In the method for blending the low value-added product with the high-sulfur residual oil, a blending mode mostly adopts tank blending, each component oil is mixed and added into a tank, the residual oil and the thin oil are uniformly mixed by adopting methods such as pump circulation, electric stirring and the like, and because the viscosity difference between the residual oil and the thin oil is large, the blending mode consumes long time and has large oil loss, and the intermittent blending mode cannot realize continuous production.

If a static mixer is added in the mixing process, when the viscosity ratio and the density of the heavy component oil and the light component oil are higher, the mixed oil still has a layering phenomenon in the static mixer, the local heterogeneity is large, the mixing effect is poor, in the prior art, a one-step colloid mill is added after the static mixer is mixed, the condition between the local heterogeneity and the colloid is prominent, even if the granularity of the colloid becomes small, the colloid with small granularity still has a caking trend unless the one-step static mixing is carried out, the mixing effect is poor, and if the one-step static mixing is added, the whole mixing process is too complicated, the energy consumption is too high, the reconstruction system is complex, and the equipment cost is high.

Disclosure of Invention

The utility model discloses the technical problem that will solve is: overcomes the defects of the prior art, and provides a fuel oil blending system which can continuously and uniformly blend fuel oil, and has low modification cost and simple structure.

The utility model provides a technical scheme that its technical problem adopted is: a fuel oil blending system, characterized by: comprises a catalytic oil slurry tank, a catalytic diesel tank, a VRDS normal slag tank, a finished product tank, a primary static mixer, a primary ultrasonic mixing unit, a secondary static mixer and a secondary ultrasonic mixing unit; the catalytic diesel tank and the catalytic diesel tank are both connected to a first-stage static mixer, an outlet of the first-stage static mixer is connected with a first-stage ultrasonic mixing unit, an outlet of the first-stage ultrasonic mixing unit and the VRDS normal slag tank are both connected to a second-stage static mixer, an outlet of the second-stage static mixer is connected with a second-stage ultrasonic mixing unit, and an outlet of the second-stage ultrasonic mixing unit is connected with a finished product tank.

The catalytic slurry oil and the catalytic diesel oil are firstly preliminarily premixed in a primary static mixer, then enter a primary ultrasonic mixing unit to be uniformly mixed, then are discharged and are premixed with VRDS (reduced reactive diesel) long residue oil in a secondary static mixer, enter a secondary ultrasonic mixing unit to be uniformly mixed, and finally are blended and enter a finished product tank.

The two kinds of oil with relatively close density and viscosity property are mixed and then mixed with the VRDS long residual oil with relatively high density and viscosity, so that at least two kinds of oil products can be uniformly mixed and are not easy to stratify, and multi-oil stratification is avoided.

Preferably, the first-stage ultrasonic mixing unit and the second-stage ultrasonic mixing unit are ultrasonic mixers, and each ultrasonic mixer comprises an ultrasonic generator, a cavity, a reverse flow generator, an oil outlet pipe and an oil inlet pipe; the ultrasonic generators are at least two and are respectively positioned at two ends of the cavity, the ultrasonic directions of the two ultrasonic generators are opposite and parallel to the liquid flowing direction in the cavity, and the oil outlet pipe and the oil inlet pipe are connected to the cavity.

Ultrasonic generators in the ultrasonic mixing unit respectively form ultrasonic waves in the flowing directions of forward-flow oil products and reverse-flow oil products, the action length of the ultrasonic waves can be extended easily along the flowing direction of materials, molecules can be subjected to violent vibration, extrusion and deformation by the aid of opposite ultrasonic waves, and macromolecules such as colloid, asphaltene and the like in common residual oil can be subjected to segregation and then mixing under the condition of two opposite ultrasonic waves, so that crushing and mixing are synchronously realized, two oil products with different properties can be blended in one step, and the mixing effect is improved; and the relative ultrasonic wave of the same frequency will resonate, can generate heat with certain frequency, and the acted molecule produces high temperature, reduces viscosity, increases the thermal motion, further improves the mixing effect.

The mixing system that has used static mixer and ultrasonic mixing unit collocation simultaneously in the mediation system, only as premixing unit with the higher static mixer of energy consumption, even the material after premixing still stratifies, also can the intensive mixing in ultrasonic mixing unit, and the preliminary mixing that static mixer provided enables to get into two kinds of oil volume ratio controllable of ultrasonic mixing unit, improves the mixed effect of ultrasonic mixing unit, and two kinds of mixed modes are synergistic in coordination.

Preferably, the cavity include the main cavity body, import reducing chamber and export reducing chamber communicate respectively into oil pipe and go out oil pipe back and connect at the main cavity body both ends.

The reducing cavity can ensure that the entering oil is extruded and deformed more greatly, and is beneficial to improving the mixing effect.

Preferably, the main cavity is tubular. The tubular shape is more beneficial to the transmission of ultrasonic waves, the action area of the ultrasonic waves is prolonged, the action area and the action intensity of the ultrasonic wave forward-backward flow are prolonged, and the flow resistance can be reduced.

Preferably, the diameter of the inlet variable diameter cavity and the diameter of the outlet variable diameter cavity decrease along the direction close to the main cavity body. The structure enables the oil to form a diffusion-extrusion-diffusion flow form, enhances the irregular flow of materials and fully ensures the uniform mixing of the oil.

Preferably, the part of the inlet variable diameter cavity and the part of the outlet variable diameter cavity, which are connected with the main cavity body, are provided with hollow baffles. The hollow baffle plate is equivalent to a reducing structure, and the materials in front of and behind the hollow baffle plate form an extrusion diffusion flow form in a short time, so that the mixing effect and speed of the materials are obviously improved; meanwhile, part of ultrasonic waves are reflected in the reducing structure by the baffle plate, which is equivalent to the introduction of uncertain energy into the reducing structure, laminar flow in the reducing cavity can be at least avoided, turbulence in the reducing cavity is further ensured, and the mixing effect is ensured.

The oil inlet direction of the oil inlet pipe is perpendicular to the oil flowing direction in the cavity. The material entering the cavity is ensured to impact the wall of the cavity at least once, so that laminar flow in the ultrasonic mixing unit is avoided, and the mixing effect is ensured.

Preferably, the first-stage ultrasonic mixing unit is formed by connecting more than two ultrasonic mixers in parallel or in series.

Preferably, the second-stage ultrasonic mixing unit is formed by connecting more than two ultrasonic mixers in parallel or in series.

A plurality of ultrasonic wave mixing unit can promote entire system's material velocity of flow and promote production efficiency, perhaps can make the material through multistage ultrasonic wave mixing unit reinforcing mixing effect.

Compared with the prior art, the utility model discloses the beneficial effect who has is: the whole system can continuously and uniformly blend the fuel oil without interrupting production, thereby improving the production efficiency; the static mixer and the ultrasonic mixing unit are combined, so that the mixing effect is better, and the production efficiency is higher; the whole device has simple structure, convenient modification, lower equipment cost and energy consumption and is suitable for blending various oil products with different viscosities and densities.

Drawings

FIG. 1 is a schematic diagram of a fuel oil blending system.

Fig. 2 is a schematic diagram of a primary ultrasonic mixing unit.

Fig. 3 is a schematic diagram of a two-stage ultrasonic mixing unit.

FIG. 4 is a schematic view of the internal structure of the ultrasonic mixer

The device comprises a catalytic diesel tank 6, a catalytic diesel tank 7, a VRDS normal slag tank 8, a finished product tank 9, a primary static mixer 10, a primary ultrasonic mixing unit 11, a secondary static mixer 12, a secondary ultrasonic mixing unit 13, a downstream ultrasonic generator 1, a cavity 2, a counter-flow ultrasonic generator 3, an oil outlet pipe 4, an oil inlet pipe 5, a main cavity 21, an inlet reducer cavity 22 and an outlet reducer cavity 23.

Detailed Description

The present invention will be further described with reference to the accompanying drawings 1-4.

Referring to the attached figures 1-4: a fuel oil blending system comprises a catalytic oil slurry tank 6, a catalytic diesel oil tank 7, a VRDS normal slag tank 8, a normal slag tank 9, a primary static mixer 10, a primary ultrasonic mixing unit 11, a secondary static mixer 12 and a secondary ultrasonic mixing unit 13; the catalytic diesel oil slurry tank 6 and the catalytic diesel oil tank 7 are respectively connected with an oil pump and then connected to a first-stage static mixer 10, the outlet of the first-stage static mixer 10 is connected with a first-stage ultrasonic mixing unit 11, the outlet of the first-stage ultrasonic mixing unit 11 is connected to a second-stage static mixer 12, the VRDS normal slag tank 8 is also connected to the second-stage static mixer 12 through the oil pump, the outlet of the second-stage static mixer 12 is connected with a second-stage ultrasonic mixing unit 13, and the outlet of the second-stage ultrasonic mixing unit 13 is connected with a finished product tank 9; stop valves are arranged between the tank bodies of the 6 catalytic slurry tank, the 7 catalytic diesel tank and the 8-VRDS normal slag tank and the oil pump and in front of the inlet of the finished product tank 9.

The first-stage ultrasonic mixing unit 11 and the second-stage ultrasonic mixing unit 13 are ultrasonic mixers, and each ultrasonic mixer comprises an ultrasonic generator, a cavity 2, an oil outlet pipe 4 and an oil inlet pipe 5; the ultrasonic generators are respectively a downstream ultrasonic generator 1 and a counter-current ultrasonic generator 3, and are respectively positioned at two ends of the cavity 2, the main cavity 21 is tubular, the two ultrasonic generation directions are opposite and parallel to the main cavity 21, and the oil outlet pipe 4 and the oil inlet pipe 5 are connected on the cavity.

The cavity 2 includes the main cavity body 21, import reducing chamber 22 and export reducing chamber 23, import reducing chamber 22 communicates respectively with export reducing chamber 23 and advances oil pipe 5 and go out oil pipe 4 back connection at the main cavity body 21 both ends, import reducing chamber 22 diminishes along the direction diameter that is close to the main cavity body 21 with export reducing chamber 23, import reducing chamber 22 is equipped with hollow baffle 24 with the part that export reducing chamber 23 is connected the main cavity body 21, go out oil pipe 4 and advance the oil feed that oil pipe 5 divides and go out oil direction perpendicular to main cavity body 2.

The first-stage ultrasonic mixing unit 11 is a system accessed after two ultrasonic mixers are connected in parallel, and the second-stage ultrasonic mixing unit 13 is a system accessed after two ultrasonic mixers are connected in series.

Catalytic slurry oil and catalytic diesel oil are preliminarily mixed in a primary static mixer 10 through a stop valve and an oil pump and then enter a primary ultrasonic mixing unit 11 to be fully mixed, VRDS (reduced reactive diesel) normal residual oil passes through the stop valve and the oil pump, enters a secondary static mixer 12 with a mixture from the primary ultrasonic mixing unit 11 to be premixed, then enters a secondary ultrasonic mixing unit 13 to be uniformly mixed, and finally enters a finished product tank 9 through the stop valve. The first-stage ultrasonic mixing unit 11 can adopt an ultrasonic mixer parallel mode due to small mixing difficulty, so that the mixing efficiency is accelerated, the VRDS (reduced viscosity direct discharge) long residue oil mixed by the second-stage ultrasonic mixing unit 13 has large viscosity and density, and the multistage ultrasonic mixers are connected in series for multistage mixing, so that the mixing effect is improved. The multi-stop valve is convenient for controlling the on-off of the whole system and simultaneously is convenient for controlling the using amount of certain component oil.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims (9)

1. A fuel oil blending system, characterized by: comprises a catalytic oil slurry tank (6), a catalytic diesel tank (7), a VRDS normal slag tank (8), a finished product tank (9), a primary static mixer (10), a primary ultrasonic mixing unit (11), a secondary static mixer (12) and a secondary ultrasonic mixing unit (13); catalytic oil slurry tank (6) all are connected to one-level static mixer (10) with catalytic diesel tank (7), one-level static mixer (10) exit linkage one-level ultrasonic wave mixing unit (11), one-level ultrasonic wave mixing unit (11) export all is connected to second grade static mixer (12) with VRDS normal sediment jar (8), second grade static mixer (12) exit linkage second grade ultrasonic wave mixing unit (13), second grade ultrasonic wave mixing unit (13) exit linkage finished product jar (9).

2. The fuel oil blending system of claim 1, wherein: the primary ultrasonic mixing unit (11) and the secondary ultrasonic mixing unit (13) are ultrasonic mixers, and each ultrasonic mixer comprises an ultrasonic generator, a cavity (2), an oil outlet pipe (4) and an oil inlet pipe (5); the ultrasonic generators are at least two and are respectively positioned at two ends of the cavity (2), the ultrasonic directions of the two ultrasonic generators are opposite and parallel to the liquid flowing direction in the cavity (2), and the oil outlet pipe (4) and the oil inlet pipe (5) are connected on the cavity.

3. The fuel oil blending system of claim 1, wherein: cavity (2) including the main cavity body (21), import reducing chamber (22) and export reducing chamber (23) communicate respectively into oil pipe (5) and go out oil pipe (4) back and connect at the main cavity body (21) both ends.

4. The fuel oil blending system of claim 2, wherein: the main cavity (21) is tubular.

5. The fuel oil blending system of claim 2, wherein: the diameter of the inlet variable diameter cavity (22) and the diameter of the outlet variable diameter cavity (23) are reduced along the direction close to the main cavity body (21).

6. The fuel oil blending system of claim 2, wherein: the part of the inlet variable diameter cavity (22) and the part of the outlet variable diameter cavity (23) which are connected with the main cavity body (21) are provided with hollow baffles (24).

7. The fuel oil blending system of claim 2, wherein: the oil inlet direction of the oil inlet pipe (5) is vertical to the oil flowing direction in the cavity (2).

8. The fuel oil blending system of claim 2, wherein: the primary ultrasonic mixing unit (11) is formed by connecting more than two ultrasonic mixers in parallel or in series.

9. The fuel oil blending system of claim 2, wherein: the secondary ultrasonic mixing unit (13) is formed by connecting more than two ultrasonic mixers in parallel or in series.

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