CN108059973B

CN108059973B - Taper angle sieve plate piston type oil-water separation device and method thereof

Info

Publication number: CN108059973B
Application number: CN201711310879.XA
Authority: CN
Inventors: 马学虎; 陈彦松; 兰忠; 徐威
Original assignee: Dalian University of Technology
Current assignee: Dalian University of Technology
Priority date: 2017-12-11
Filing date: 2017-12-11
Publication date: 2020-01-14
Anticipated expiration: 2037-12-11
Also published as: CN108059973A

Abstract

A piston type oil-water separation device with a cone angle sieve plate as a separation element and a method thereof belong to the technical field of equipment used in the petroleum and natural gas industry, the sewage treatment industry and the like. The device comprises a dynamic sealing structure, a piston structure, a cone angle sieve plate, an orifice plate filter screen, a raw material inlet and a valve mechanism thereof, a waste water outlet and an oil valve mechanism thereof, a product oil outlet and a valve thereof and the like. The cylinder body structure is divided into three working sections, namely a raw oil section, a separation section and a product oil section in sequence, and the lengths of the three working sections are periodically changed along with the movement of the piston rod. The piston structure is formed by welding a piston rod, a filter screen and a cone angle structure sieve plate subjected to super-hydrophobic treatment together. Raw oil firstly enters a raw oil section and is separated by a separation section, water flows back under the pulling of a piston, and product oil flows to a product oil section and flows out of the device. The beneficial effects of the invention are as follows: the device is modularized and convenient to integrate, and different numbers of devices can form a parallel system; a super-hydrophobic cone angle structure is adopted, so that the separation efficiency is high; the cone angle sieve plate is adjustable, so that different separation requirements are met; can be continuously operated and has high production efficiency.

Description

Taper angle sieve plate piston type oil-water separation device and method thereof

Technical Field

The invention relates to the technical field of equipment used in the petroleum and gas industry, the sewage treatment industry and the like, in particular to an oil-water separation device with a piston and a method thereof, wherein a cone angle sieve plate is used as a separation element.

Background

With the continuous rise of the worldwide oil exploitation amount, the oil fields with high reserves and large abundance are increasingly exhausted, the water content of crude oil is continuously increased, and the energy crisis is urgently solved as a poor oil country and an energy consumption country in China. Separation of crude oil with high water content is difficult. On one hand, the traditional treatment methods such as thermal sedimentation, electro-sedimentation and the like have larger production energy consumption and lower efficiency; on the other hand, methods such as demulsifiers and the like can pollute crude oil and increase the energy consumption for downstream production and separation. The existing crude oil-water oil separation method has high energy consumption and time cost and cannot well adapt to the reality of energy shortage. For crude oil with emulsion property, how to design separation equipment to carry out efficient demulsification on the crude oil, and meanwhile, the production efficiency is improved, the energy consumption is reduced, crude oil is roughly separated, and the practical problem to be solved at present is urgently needed.

Disclosure of Invention

The invention aims to solve the problems of overlarge energy consumption and lower efficiency in the crude oil water-oil crude separation process in the prior art. The invention provides a modularized and integratable high-efficiency piston type water-oil separation device and a using method thereof.

The technical scheme of the invention is as follows: a cone angle sieve plate piston type oil-water separation device comprises a cavity, wherein the top of the cavity is a cavity top plate, one side of the cavity top plate is provided with a raw material inlet with an inlet valve mechanism, and the other side of the cavity top plate is provided with a wastewater outlet with an outlet valve mechanism; the device is also provided with a piston rod which penetrates through the top plate of the cavity and enters the cavity, and a dynamic sealing mechanism is arranged between the piston rod and the top plate of the cavity; the bottom of the piston rod is welded with a perforated plate strainer, the perforated plate strainer structure, the piston linkage shell and the support net form a cavity structure, a cone angle dredging sieve plate and a cone angle dense sieve plate are arranged in the cavity structure from top to bottom, the cone angle dredging sieve plate is formed by welding triangular cone metal blocks in a dense arrangement mode, and the range of pores among cone angles of the cone angle dredging sieve plate is 0.5-2 mm; the dense cone angle sieve plate is formed by densely arranging and welding triangular cone metal blocks into a plate, and the pores among the cone angles of the dense cone angle sieve plate are 0.05-0.5 mm; the sieve plate with the sparse cone angle and the sieve plate with the dense cone angle are subjected to super-hydrophobic and super-oleophilic treatment; the total number of layers of the sieve plate with the sparse cone angle and the sieve plate with the dense cone angle is 9 to 20; and a product oil outlet with a product oil outlet valve is arranged at the bottom of the cavity.

The pore plate filter screen structure is formed by sintering the pore plate and the filter screen, the pore diameter and the distribution of the pore plate are uniform and symmetrical, and the pore plate filter screen structure is detachably connected with the mechanical connection of the piston linkage shell.

The characteristic size range of pores between the cone angles of the sieve plate with the sparse cone angles is selected from 0.5-2mm, the characteristic size of pores between the cone angles of the sieve plate with the dense cone angles is selected from 0.05-0.5mm, the total layer number is selected from 9 layers to 20 layers, and the sieve plate is made of metals such as copper, iron and aluminum or non-metals such as ceramics and plastics, which can be used for preparing a super-hydrophobic and super-oleophilic surface.

The super-hydrophobic treatment method of the sparse cone angle sieve plate and the dense cone angle sieve plate comprises a micro-nano structure preparation method and a low surface energy treatment method, wherein the micro-nano structure preparation method comprises a general etching method, a phase separation method, an electrospinning method, a sol-gel method, a template method, plasma etching, particle coating and other methods; the low surface energy treatment method comprises the following steps: ion implantation, laser etching, vapor deposition, electrochemical deposition, electroplating, low surface energy coatings, and the like.

The inlet valve mechanism opens when the piston rod is pushed down to one fifth of its stroke and closes when the piston rod is pulled up.

The outlet valve mechanism opens when the piston rod is pulled up to three fifths of the stroke and closes when the piston rod is pushed down.

The bottom of the cavity is mechanically sealed and can be opened, and the piston linkage shell and the supporting net can be taken out from the bottom to replace the sparse cone angle sieve plate structure and the dense cone angle sieve plate structure.

The method for separating oil from water by using the cone angle sieve plate piston type oil-water separator comprises the following steps:

a. the piston rod is pushed to the product oil section from the top of the shell, when the stroke reaches one fifth, the inlet valve mechanism is opened, and the raw oil enters the raw oil section.

b. When the piston rod moves to the bottom position of the shell, the pushing-down is stopped, and the inlet valve mechanism is closed.

c. The piston rod is pulled back to the product oil section from the bottom position of the shell, and when the stroke reaches three fifths, the outlet valve mechanism is opened, and wastewater flows out of the raw oil section.

d. The piston rod stops pulling upward when moving to the top position of the housing and the outlet valve mechanism closes.

e. If the purity needs to be improved, the stream at the waste water outlet can be recycled to the raw material inlet for use.

The invention has the beneficial effects that: the device comprises a piston rod and a cavity, wherein the bottom of the piston rod is connected with a demulsification structure, the structure is provided with a porous plate filter screen structure, a piston linkage shell and a support screen to form a hollow cavity, a cone angle dredging sieve plate and a cone angle compacting sieve plate are arranged in the cavity from top to bottom, and the piston rod drives the demulsification structure to move up and down to demulsify crude oil. The device is modularized and convenient to integrate, and different numbers of devices can form a parallel system; a super-hydrophobic cone angle structure is adopted, so that the separation efficiency is high; the cone angle sieve plate is adjustable, so that different separation requirements are met; can be continuously operated and has high production efficiency.

Drawings

The present invention will be described in further detail below with reference to the accompanying drawings.

Fig. 1 is a structural view of a cone angle sieve plate piston type oil-water separator.

Fig. 2 is a flow chart of a cone angle sieve plate piston type oil-water separation method.

In the figure: 1. the device comprises a cavity, 1a, a cavity top plate, 2, a raw material inlet, 3, an inlet valve mechanism, 4, a wastewater outlet, 5, an outlet valve mechanism, 6, a dynamic sealing mechanism, 7, a piston rod, 8, a pore plate filter screen structure, 9, a piston linkage shell, 10, a cone angle dredging sieve plate, 11, a cone angle sealing sieve plate, 12, a support screen, 13, a product oil outlet, 14 and a product oil outlet valve.

Detailed Description

For a better understanding of the invention, reference will now be made in detail to the present invention, examples of which are illustrated in the accompanying drawings

The examples are only for explaining the present invention and do not constitute a limitation to the scope of protection of the present invention.

The cone-angle sieve plate piston type oil-water separation device shown in fig. 1 mainly comprises the following components:

the device comprises a cavity 1, a raw material inlet 2, an inlet valve mechanism 3, a wastewater outlet 4, an outlet valve mechanism 5, a dynamic sealing mechanism 6, a piston rod 7, a pore plate filter screen structure 8, a piston linkage shell 9, a cone angle dredging sieve plate 10, a cone angle sealing sieve plate 11, a support net 12, a product oil outlet 13 and a product oil outlet valve 14; the cavity 1 is divided into a raw oil section, a separation section and a product oil section by a piston structure; the piston rod 7 is welded with the pore plate filter screen structure 8 and is mechanically connected with the piston linkage shell 9, and the support net 12 is welded with the piston linkage shell 9; the piston rod 7 is connected with the cavity 1 through a dynamic sealing structure 6; the sieve plate structure 10 with the sparse cone angle and the sieve plate structure 11 with the dense cone angle are formed by densely arranging and welding triangular cone metal blocks into plates; the sparse cone angle sieve plate structure 10 and the dense cone angle sieve plate structure 11 are made of red copper, and are subjected to super-hydrophobic and super-oleophilic treatment by an oxidation etching gas-entrained phase deposition method.

The pore plate filter screen structure 8 is formed by sintering a pore plate and a filter screen, the pore diameter of the pore plate is 5mm, the pore plate is uniformly and symmetrically distributed, and the pore plate is connected with a mechanical buckle of the piston linkage shell 9. The width of the pore between the cone angles of the sieve plate with the sparse cone angle 10 is 0.5mm, the width of the pore between the cone angles of the sieve plate with the dense cone angle 11 is 0.05mm, and the number of layers is respectively 3 and 6. The inlet valve mechanism 3 opens when the piston rod 7 is pushed down to a position of one fifth of the stroke and closes when the piston rod 7 is pulled up. The outlet valve mechanism 5 opens when the piston rod 7 is pulled up to three fifths of the stroke and closes when the piston rod 7 is pushed down. The bottom of the cavity 1 is mechanically static sealed and can be opened, the piston linkage shell 9 and the supporting net 12 can be taken out from the bottom, and the sieve plate structure 10 with sparse cone angle and the sieve plate structure 11 with dense cone angle can be replaced.

When the technical scheme is adopted for working:

a. the piston rod 7 is pushed to the product oil section from the top of the shell, when the stroke reaches one fifth, the inlet valve mechanism 3 is opened, and the raw oil enters the raw oil section.

b. When the piston rod 7 moves to the bottom position of the housing, the push-down is stopped, and the inlet valve mechanism 3 is closed.

c. The piston rod 7 is pulled back to the product oil section from the bottom position of the shell, and when the stroke reaches three fifths, the outlet valve mechanism 5 is opened, and the wastewater flows out of the raw oil section.

d. The piston rod 7 stops pulling up when it moves to the top position of the housing and the outlet valve mechanism 5 closes.

e. If purity is to be improved, the waste water stream from the waste water outlet 4 can be recycled back to the raw material inlet 2 for use.

The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the invention, which is intended to be covered by the claims and any design similar or equivalent to the scope of the invention.

Claims

1. The utility model provides a cone angle sieve piston formula oil-water separator which characterized in that: the device comprises a cavity (1), wherein the top of the cavity (1) is a cavity top plate (1 a), one side of the cavity top plate (1 a) is provided with a raw material inlet (2) with an inlet valve mechanism (3), and the other side of the cavity top plate (1 a) is provided with a wastewater outlet (4) with an outlet valve mechanism (5); the device is also provided with a piston rod (7) which penetrates through the cavity top plate (1 a) and enters the cavity (1), and a dynamic sealing mechanism (6) is arranged between the piston rod (7) and the cavity top plate (1 a); the bottom of the piston rod (7) is welded with a pore plate filter screen structure (8), the pore plate filter screen structure (8) is mechanically connected with a piston linkage shell (9), a support net (12) is welded with the piston linkage shell (9), the pore plate filter screen structure (8), the piston linkage shell (9) and the support net (12) form a cavity structure, a cone angle dredging sieve plate (10) and a cone angle dense sieve plate (11) are arranged in the cavity structure from top to bottom, the cone angle dredging sieve plate (10) is formed by densely arranging and welding triangular cone metal blocks, and the pore range between cone angles of the cone angle dredging sieve plate (10) is 0.5-2 mm; the dense cone angle sieve plate (11) is formed by densely arranging and welding triangular cone metal blocks into a plate, and the pores among the cone angles of the dense cone angle sieve plate (11) are 0.05-0.5 mm; the sieve plate (10) with the sparse cone angle and the sieve plate (11) with the dense cone angle are subjected to super-hydrophobic and super-oleophilic treatment; the total number of layers of the sieve plate (10) with the sparse cone angle and the sieve plate (11) with the dense cone angle is 9 to 20; the bottom of the cavity (1) is provided with a product oil outlet (13) with a product oil outlet valve (14).

2. The cone angle sieve plate piston type oil-water separator as claimed in claim 1, wherein: the pore plate filter screen structure (8) is formed by sintering a pore plate and a filter screen, the pore diameter of the pore plate is 3-5mm, the pore plate is uniformly and symmetrically distributed, and the pore plate filter screen structure (8) is mechanically connected with the piston linkage shell (9).

3. The cone angle sieve plate piston type oil-water separator as claimed in claim 1, wherein: the super-hydrophobic and super-oleophilic treatment method for the sparse cone angle sieve plate (10) and the dense cone angle sieve plate (11) comprises a micro-nano structure preparation method and a low surface energy treatment method, wherein the micro-nano structure preparation method comprises a general etching method, a phase separation method, an electrospinning method, a sol-gel method, a template method, plasma etching or particle coating; the low surface energy treatment method is ion implantation, laser etching, vapor deposition, electrochemical deposition, electroplating or low surface energy coating.

4. The separation method of the cone angle sieve plate piston type oil-water separation device according to claim 1, characterized by comprising the following steps:

(1) the piston rod (7) is pushed to the product oil section from the top position of the shell, when the stroke reaches one fifth, the inlet valve mechanism (3) is opened, and the raw oil enters the raw oil section;

(2) when the piston rod (7) moves to the bottom position of the shell, the pushing-down is stopped, and the inlet valve mechanism (3) is closed;

(3) the piston rod (7) is pulled back to the product oil section from the bottom position of the shell, when the stroke reaches three fifths, the outlet valve mechanism (5) is opened, and the wastewater flows out of the raw oil section;

(4) when the piston rod (7) moves to the top position of the shell, the upward pulling is stopped, and the outlet valve mechanism (5) is closed.