A coalescing flow guide module and apparatus for enhanced multiphase rapid separation

Abstract

The application provides a coalescence flow guide module and equipment for strengthening multiphase quick separation, which is composed of "eight" shaped coalescence units formed by first coalescence plates and second coalescence plates respectively inwardly inclined at an angle, and the coalescence flow guide module is formed by horizontal and vertical translation and superposition of the coalescence units; gaps are left between adjacent first coalescence plates and second coalescence plates in the vertical direction; the gaps in the coalescence units form ascending channels in the vertical direction, and the gaps between adjacent coalescence units form descending channels in the vertical direction. The application utilizes the shallow pool principle to reduce the time required for liquid droplets to float or sink, and utilizes the hydrophilicity and hydrophobicity of the material surface of the coalescence plate to improve the liquid droplet coalescence efficiency; the inclined coalescence plate forms completely separated and non-interfering ascending channels and descending channels, so that the multiphase quick separation can be realized, and the application has the advantages of small flow resistance, good coalescence effect and difficult back mixing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of multiphase separation, and particularly relates to a coalescence flow guide module and equipment for strengthening multiphase rapid separation. BACKGROUND

[0002] In a petroleum chemical production process, sewage containing a multiphase system of suspended solids, oil, water and solid particle impurities is usually generated. In the sewage treatment process, the sewage needs to be pretreated first, and the suspended solids, oil and solid particle impurities in the sewage need to be removed as much as possible in the pretreatment process to ensure the stable operation of the subsequent sewage advanced treatment system. A fast and efficient pretreatment technology can not only reduce the sewage treatment cost and reduce the equipment footprint, but also can recycle the materials with utilization value and avoid resource waste.

[0003] At present, the technologies for strengthening multiphase rapid separation under a gravity field based on the principle of "shallow pool sedimentation" mainly include corrugated fillers, parallel plate structures and inclined plate structures. Among them, the corrugated fillers have a larger contact area and collision probability of fluid in the running process due to the concave-convex structure and the openings at the wave crests and wave troughs, but there is also back mixing between layers, so some engineers also apply the corrugated fillers to two-phase mixing.

[0004] The parallel plate structure and the inclined plate structure are the simplest and most direct embodiment of the principle of "shallow pool sedimentation", which can shorten the sedimentation time of liquid droplets, and are widely used in the optimization of gravity settlers due to their simple processing and low cost. However, the parallel plate structure lacks ascending and descending channels, and cannot make the coalesced liquid droplets float or sink quickly, and the deposition of impurities occurs on the parallel plate. Although the inclined plate structure improves the shortcomings of the parallel plate structure to some extent, its structural characteristics also lead to the reduction of fluid cross-section utilization, limiting its effect in strengthening gravity sedimentation. SUMMARY

[0005] To solve the above problems in the prior art, the present application provides a coalescence flow guide module and equipment for strengthening multiphase rapid separation.

[0006] The technical scheme adopted by the present application is as follows:

[0007] The first aspect of the present application is to provide a coalescence flow guide module for strengthening multiphase rapid separation, which is composed of "eight" shaped coalescence units formed by first coalescence plates and second coalescence plates respectively inwardly inclined at a certain angle, and the coalescence flow guide module is formed by translating and stacking the coalescence units in the horizontal direction and the vertical direction, and gaps are left between adjacent first coalescence plates and second coalescence plates in the vertical direction.

[0008] The first coalescing plate and the second coalescing plate are both provided with a plurality of through holes, and vertically adjacent first coalescing plates or second coalescing plates are fixedly connected through a plurality of parallel support columns passing through the corresponding through holes.

[0009] The first coalescing plate and the second coalescing plate in the coalescing unit are fixedly connected through a connecting plate passing through two adjacent support columns.

[0010] The gap in the coalescing unit forms an upward channel in the vertical direction, and the gap between adjacent coalescing units forms a downward channel in the vertical direction.

[0011] Further, the coalescing flow guide module further comprises a plurality of internally hollow distance blocks, the upper and lower end faces of the distance block are parallel and inclined at an angle; the distance block is installed between the upper and lower two first coalescing plates or second coalescing plates by being sleeved on the support column, and the upper and lower end faces of the distance block are attached to the upper and lower two first coalescing plates or second coalescing plates; wherein the inclination angle γ of the upper and lower end faces of the distance block is 30-60°, preferably 45°.

[0012] Further, the distance block further comprises an upper and lower two-section structure truncated in the middle, the upper and lower two sections of the distance block are respectively installed on the upper and lower sides of the connecting plate by being sleeved on the support column.

[0013] Further, the angle α of the inward inclination of the first coalescing plate is 30-60°, preferably 45°; the angle β of the inward inclination of the second coalescing plate is 30-60°, preferably 45°.

[0014] Further, the vertical distance H1 between the upper end of the first coalescing plate and the upper end of the second coalescing plate in the coalescing unit is 1-10 mm; the length D0 of the first coalescing plate and the second coalescing plate is 50-500 mm; the coincident width D of the adjacent first coalescing plate and the second coalescing plate in the coalescing flow guide module in the horizontal projection direction is 0.05-0.5D0.

[0015] Further, when the first coalescing plate in the coalescing unit is on the upper side, in the vertically adjacent coalescing unit, the vertical distance H2 from the upper end of the second coalescing plate of the upper side coalescing unit to the upper end of the first coalescing plate of the lower side coalescing unit is 5-50 mm.

[0016] Further, when the second coalescing plate in the coalescing unit is on the upper side, in the vertically adjacent coalescing unit, the vertical distance H3 from the upper end of the first coalescing plate of the upper side coalescing unit to the upper end of the second coalescing plate of the lower side coalescing unit is 5-50 mm.

[0017] Further, the first coalescing plate and the second coalescing plate adopt a metal plate or a non-metal plate with hydrophilic one side and hydrophobic the other side after surface modification; or adopt a double-layer plate stacked by a flat plate with hydrophilic and a flat plate with hydrophobic, the flat plate adopts a stainless steel plate or a polytetrafluoroethylene plate.

[0018] Further, the first coalescing plate and the second coalescing plate have the hydrophilic side upward and the hydrophobic side downward.

[0019] The second aspect of the present application provides a device for strengthening multi-phase rapid separation using the coalescing flow guide module, the device comprises a horizontal tank body, the coalescing flow guide module and a multi-phase medium inlet at the left end of the tank body, a light phase medium outlet and a heavy phase medium outlet at the upper and lower sides of the right end of the tank body respectively; the coalescing flow guide module is installed in the interior of the tank body and close to one side of the multi-phase medium inlet.

[0020] The third aspect of the present application provides a separation method of the device for strengthening multi-phase rapid separation using the coalescing flow guide module, comprising the following steps:

[0021] The multi-phase medium enters the interior of the tank body through the multi-phase medium inlet, when flowing through the coalescing flow guide module, the light phase medium in the multi-phase medium rapidly floats to the lower surface of the first coalescing plate or the second coalescing plate, and the heavy phase medium in the multi-phase medium rapidly sinks to the upper surface of the first coalescing plate or the second coalescing plate;

[0022] The heavy phase medium and the light phase medium respectively gather and grow on the upper and lower surfaces of the first coalescing plate and the second coalescing plate during the flowing process, the gathered and grown light phase medium rapidly floats to the uppermost layer in the tank body through the ascending channel, and then is discharged through the light phase medium outlet; the gathered and grown heavy phase medium rapidly sinks to the bottom of the tank body through the sinking channel, and then is discharged through the heavy phase medium outlet.

[0023] The fourth aspect of the present application provides an application of the device for strengthening multi-phase rapid separation using the coalescing flow guide module, for strengthening multi-phase rapid separation.

[0024] The present application has the following beneficial effects:

[0025] The coalescence flow guide module and the device for strengthening multiphase quick separation of the application utilize the shallow pool principle to reduce the time required for the floating or sinking of liquid drops, and utilize the hydrophilicity and hydrophobicity of the material surface of the first coalescence plate and the second coalescence plate to improve the liquid drop coalescence efficiency. When flowing through the coalescence flow guide module, the liquid drops can quickly contact the coalescence plate and coalesce and grow on the coalescence plate. Without reducing the use rate of the flow cross section, the advantages of the plate structure are maximized. The inclined coalescence plate forms completely separated and non-interfering rising channels and sinking channels. The light phase liquid drops and the heavy phase liquid drops coalesce and grow and then quickly reach the upper layer and the lower layer of the tank body through the rising channels and the sinking channels, respectively. The application can realize the quick separation of multiphase and has the advantages of small flow resistance, good coalescence effect and difficult back mixing. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structure schematic view of the coalescence flow guide module of the application (the local section view of the distance block is at A in the figure).

[0027] Figure 2 is a top view of the connection relationship between the first coalescence plate and the second coalescence plate of the application.

[0028] Figure 3 is Figure 1 is a local enlarged view of B in

[0029] Figure 4 is a movement direction schematic view of the light phase medium and the heavy phase medium flowing through the coalescence flow guide module (the black circle represents the light phase medium, and the white circle represents the heavy phase medium).

[0030] Figure 5 is a structure schematic view of the distance block of the application.

[0031] Figure 6 is a structure parameter schematic view of the coalescence flow guide module of the application (the first coalescence plate is on the upper side in the coalescence unit).

[0032] Figure 7 is a structure parameter schematic view of the coalescence flow guide module of the application (the second coalescence plate is on the upper side in the coalescence unit).

[0033] Figure 8 is a structure schematic view of the device for strengthening multiphase quick separation of the application.

[0034] Figure 9 is a cross section schematic view of the coalescence flow guide module in the tank body.

[0035] In the figure: 100-coalescence flow guide module; 101-first coalescence plate; 102-second coalescence module; 103-distance block; 104-support column; 105-connection plate; 106-through hole; 200-tank body; 201-multiphase medium inlet; 202-heavy phase medium outlet; 203-light phase medium outlet; 301-upward channel; 302-sinking channel; 401-heavy phase medium flow path; 402-light phase medium flow path. DETAILED DESCRIPTION

[0036] The technical solutions of the present application will be described in detail below with specific examples, and it should be understood that the following examples are only part of the examples of the present application, but not all. Based on the examples in the present application, all other examples obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0037] Example 1, a coalescence flow guide module and device for strengthening multiphase rapid separation

[0038] As shown in Figure 1 , a coalescence flow guide module 100 for strengthening multiphase rapid separation is composed of a first coalescence plate 101 and a second coalescence plate 102 respectively inwardly inclined at an angle to form an "eight" shaped coalescence unit, which is translated and stacked in the horizontal and vertical directions, and a gap is left between adjacent first coalescence plates 101 and second coalescence plates 102 in the vertical direction in the coalescence flow guide module 100;

[0039] As shown in Figure 2 , a plurality of through holes 106 are formed on the first coalescence plate 101 and the second coalescence plate 102, and the adjacent first coalescence plate 101 or the second coalescence plate 102 in the vertical direction is fixedly connected by a plurality of parallel support columns 104 passing through the corresponding through holes 106;

[0040] As shown in Figure 2 and Figure 3 , the first coalescence plate 101 and the second coalescence plate 102 in the coalescence unit are fixedly connected by a connection plate 105 passing through the adjacent two support columns 104;

[0041] As shown in Figure 4 , the gap in the coalescence unit forms an upward channel 301 in the vertical direction, and the gap between adjacent coalescence units forms a sinking channel 302 in the vertical direction.

[0042] Further, as shown in Figure 5 , the coalescence flow guide module 100 further comprises a plurality of internally hollow distance blocks 103, and the upper and lower end faces of the distance blocks 103 are parallel and inclined at an angle. Back to Figure 1In the embodiment, the distance block 103 is installed between the upper and lower first or second coalescing plates 101, 102 by being sleeved on the support column 104, and the upper and lower end faces of the distance block are in contact with the upper and lower first or second coalescing plates 101, 102, so as to determine the distance between the first and second coalescing plates 101, 102 in the vertical direction in the coalescing flow guide module 100.

[0043] In the embodiment, the inclination angle γ of the upper and lower end faces of the distance block 103 is 30-60°, and preferably 45°.

[0044] Further, as shown in Figure 1 and Figure 3 , the distance block 103 further comprises an upper and lower two-section structure with a middle cut-off, and the upper and lower sections of the distance block 103 are installed on the upper and lower sides of the connecting plate 105 by being sleeved on the support column 104.

[0045] Further, as shown in Figure 6 and Figure 7 , the inclination angle α of the first coalescing plate 101 is 30-60°, and preferably 45°; and the inclination angle β of the second coalescing plate 102 is 30-60°, and preferably 45°.

[0046] Further, the vertical distance H1 between the upper end of the first coalescing plate 101 and the upper end of the second coalescing plate 102 in the coalescing unit is 1-10 mm.

[0047] When the first coalescing plate 101 in the coalescing unit is on the upper side (as shown in Figure 6 , the vertical distance H2 between the upper end of the second coalescing plate 102 in the upper coalescing unit and the upper end of the first coalescing plate 101 in the lower coalescing unit in the vertically adjacent coalescing units is 5-50 mm.

[0048] When the second coalescing plate 102 in the coalescing unit is on the upper side (as shown in Figure 7 , the vertical distance H3 between the upper end of the first coalescing plate 101 in the upper coalescing unit and the upper end of the second coalescing plate 102 in the lower coalescing unit in the vertically adjacent coalescing units is 5-50 mm.

[0049] Further, the length D0 of the first and second coalescing plates 101, 102 is 50-500 mm; and the coincident width D of the adjacent first and second coalescing plates 101, 102 in the coalescing flow guide module 100 in the horizontal projection direction is 0.05-0.5D0.

[0050] Further, the first coalescing plate 101 and the second coalescing plate 102 adopt a metal plate or a non-metal plate with hydrophilic surface and hydrophobic surface, or adopt a double-layer plate with a hydrophilic flat plate and a hydrophobic flat plate.

[0051] Further, the first coalescing plate 101 and the second coalescing plate 102 have the hydrophilic surface upward and the hydrophobic surface downward.

[0052] As shown in Figure 8 and Figure 9 , the device for strengthening the multi-phase quick separation using the coalescing flow guide module 100 includes a horizontal tank body 200, the coalescing flow guide module 100, a multi-phase medium inlet 201 at the left end of the tank body 200, a light-phase medium outlet 203 and a heavy-phase medium outlet 202 at the upper and lower sides of the right end of the tank body 200 respectively, and the coalescing flow guide module 100 is installed inside the tank body 200 and close to one side of the multi-phase medium inlet 201.

[0053] Further, the multi-phase medium refers to a mixed medium with density difference in a gravity field, including a heavy-phase medium and a light-phase medium, and the Figure 8 401 is a heavy-phase medium flow path, and 402 is a light-phase medium flow path.

[0054] As shown in Figure 4 and Figure 8 , the working principle of the present application is described by taking the example of strengthening the quick separation of the oil-water mixed multi-phase medium:

[0055] The multi-phase medium enters the tank body 200 through the multi-phase medium inlet 201, and when flowing through the coalescing flow guide module 100, the lighter oil droplets in the multi-phase medium quickly float to the lower hydrophobic surface of the first coalescing plate 101 or the second coalescing plate 102, and the heavier water droplets quickly sink to the upper hydrophilic surface of the first coalescing plate 101 or the second coalescing plate 102. The oil droplets and the water droplets respectively gather and grow on the upper and lower surfaces of the first coalescing plate 101 and the second coalescing plate 102 during the flow process, and the gathered and grown oil droplets quickly float to the uppermost layer in the tank body 200 through the upward channel 301, and then are discharged through the light-phase medium outlet 203; the gathered and grown water droplets quickly sink to the bottom of the tank body 300 through the downward channel 302, and then are discharged through the heavy-phase medium outlet 202.

[0056] Example 2

[0057] The coking plant of a refinery produces sewage containing sulfur, oil, suspended solids and other non-dissolved substances, and there is a serious emulsification situation. Before deep treatment, pretreatment separation is needed. The pretreatment separation is carried out by using the coalescence flow guide module and equipment of the enhanced multiphase rapid separation described in Example 1. The treatment capacity is 20 tons / hour, and the residence time is 4 minutes. The structure parameters of the coalescence flow guide module 100 are shown in Table 1.

[0058] Table 1, structure parameters of the coalescence flow guide module

[0059]

[0060] After treatment, the oil content in the sewage is reduced from 20,000 mg / L to 2,000 mg / L, the suspended solids content is reduced from 200 mg / L to 120 mg / L, and the emulsified oil removal efficiency is more than 80%. The device of the present application shows excellent treatment performance in the pretreatment rapid separation process. Under the premise of achieving the same treatment effect, compared with the conventional enhanced rapid separation technology, the treatment time is shortened by more than 40%, the treatment efficiency is significantly improved, and the equipment occupation, operation energy consumption and cost are not increased, which is more suitable for application and promotion.

[0061] The above description is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A coalescing flow guiding module for enhancing rapid multiphase separation, characterized in that, The coalescence guiding module is formed by overlapping "eight"-shaped coalescence units composed of a first coalescence plate and a second coalescence plate that are tilted inward at a certain angle, and the units are translated in the horizontal and vertical directions. The adjacent first coalescence plate and second coalescence plate in the coalescence guiding module have a gap in the vertical direction. The first and second coalescing plates each have several through holes, and adjacent first or second coalescing plates in the vertical direction are fixedly connected by several parallel support columns passing through the corresponding through holes. The first and second coalescing plates in the coalescing unit are fixedly connected by a connecting plate passing through two adjacent support columns. The gaps within the coalescing units form an upward channel in the vertical direction, and the gaps between adjacent coalescing units form a downward channel in the vertical direction. The vertical distance H1 between the upper ends of the first coalescing plate and the upper ends of the second coalescing plate in the coalescing unit is 1 to 10 mm; the length D0 of the first coalescing plate and the second coalescing plate is 50 to 500 mm; the overlap width D of adjacent first coalescing plates and second coalescing plates in the horizontal projection direction in the coalescing guide module is 0.05 to 0.5D0.

2. The coalescence guiding module for enhancing rapid multiphase separation according to claim 1, characterized in that, The coalescing and guiding module also includes several hollow spacer blocks, the upper and lower end faces of which are parallel and inclined at a certain angle; the spacer blocks are installed between the upper and lower first coalescing plates or second coalescing plates by being sleeved on the support column, and the upper and lower end faces of the spacer blocks are in contact with the upper and lower first coalescing plates or second coalescing plates on the upper and lower sides; wherein, the inclination angle γ of the upper and lower end faces of the spacer blocks is 30 to 60°.

3. The coalescence guiding module for enhancing rapid multiphase separation according to claim 2, characterized in that, The spacer block also includes a two-section structure with the middle section cut off. The upper and lower sections of the spacer block are respectively sleeved on the support column and installed on the upper and lower sides of the connecting plate.

4. The coalescence guiding module for enhancing rapid multiphase separation according to claim 1, characterized in that, The first coalescing plate is tilted inward at an angle α of 30–60°; the second coalescing plate is tilted inward at an angle β of 30–60°.

5. The coalescence guiding module for enhancing rapid multiphase separation according to claim 1, characterized in that, When the first coalescing plate in the coalescing unit is on the upper side, the vertical distance H2 between the upper top of the second coalescing plate of the upper coalescing unit and the upper top of the first coalescing plate of the lower coalescing unit in the vertical direction is 5 to 50 mm.

6. The coalescence guiding module for enhancing rapid multiphase separation according to claim 1, characterized in that, When the second coalescing plate in the coalescing unit is on the upper side, the vertical distance H3 between the upper top of the first coalescing plate of the upper coalescing unit and the upper top of the second coalescing plate of the lower coalescing unit in the vertical direction is 5 to 50 mm.

7. The coalescence guiding module for enhancing rapid multiphase separation according to claim 1, characterized in that, The first coalescing plate and the second coalescing plate are made of metal or non-metal plates that have been surface modified to have hydrophilic properties on one side and hydrophobic properties on the other side; or they are made of a double-layer plate composed of a hydrophilic plate and a hydrophobic plate stacked together.

8. The coalescence guiding module for enhancing rapid multiphase separation according to claim 7, characterized in that, In the first and second coalescing plates, the hydrophilic side faces upward and the hydrophobic side faces downward.

9. An apparatus employing the coalescence guiding module for enhancing rapid multiphase separation as described in any one of claims 1 to 8, characterized in that, The device includes a horizontal tank, a coalescing flow guiding module, and a multiphase medium inlet located at the left end of the tank, and light phase medium outlets and heavy phase medium outlets located on the upper and lower sides of the right end of the tank, respectively; the coalescing flow guiding module is installed inside the tank and on the side close to the multiphase medium inlet.

10. A separation method using the coalescing flow-guiding module for enhancing rapid multiphase separation as described in claim 9, characterized in that, Includes the following steps: When the multiphase medium enters the tank through the multiphase medium inlet and flows through the coalescence guiding module, the light phase medium in the multiphase medium quickly floats to the lower surface of the first coalescence plate or the second coalescence plate, while the heavy phase medium in the multiphase medium quickly sinks to the upper surface of the first coalescence plate or the second coalescence plate. During the flow process, the heavy phase medium and the light phase medium agglomerate and grow on the upper and lower surfaces of the first and second coalescing plates, respectively. After agglomeration and growth, the light phase medium quickly floats to the uppermost layer of the tank through the rising channel and is then discharged through the light phase medium outlet. After agglomeration and growth, the heavy phase medium quickly sinks to the bottom of the tank through the sinking channel and is then discharged through the heavy phase medium outlet.

11. The application of the device according to claim 9, characterized in that, Used to enhance rapid multiphase separation.

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