CN216497967U - Filtering device suitable for high-viscosity liquid-solid microfiltration separation - Google Patents

Abstract

The utility model belongs to the technical field of separation equipment, and particularly relates to a filtering device suitable for microfiltration separation of liquid and solid of high-viscosity liquid. The filter device comprises a shell and at least one microporous filter element arranged in the shell, wherein the bottom side of the shell is communicated with a liquid inlet pipe, the top side of the shell is provided with a purified liquid outlet pipe for outputting purified liquid and a compressed air inlet pipe for inputting a backflushing air source, and the bottom end of the shell is communicated with a slag discharge pipe for outputting solid waste. The utility model aims to provide a filtering device which is suitable for long-period high-precision operation of high-viscosity liquid-solid microfiltration separation.

Description

Filtering device suitable for high-viscosity liquid-solid microfiltration separation

Technical Field

The utility model belongs to the technical field of separation equipment, and particularly relates to a filtering device suitable for microfiltration separation of liquid and solid of high-viscosity liquid.

Background

The high-viscosity liquid refers to liquid with high viscosity and heavy components, such as coal tar, wax oil, catalytic cracking slurry oil and the like, and solid particles are removed before the high value-added product is processed. The filtration method is the most commonly used method with the highest liquid-solid separation yield of high-viscosity liquid in the industry, but the existing filtration method has the defects that the pressure difference is increased too fast, the separation precision cannot meet the requirement, the long-period operation cannot be realized, and the like.

SUMMERY OF THE UTILITY MODEL

In view of the above technical problems, the present invention aims to provide a filtering apparatus suitable for long-period high-precision operation of high-viscosity liquid-solid microfiltration separation.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

the filtering device is characterized by comprising a shell and at least one microporous filter element arranged in the shell, wherein the bottom side of the shell is communicated with a liquid inlet pipe, the top side of the shell is provided with a purified liquid outlet pipe for outputting purified liquid and a compressed air inlet pipe for inputting a backflushing air source, and the bottom end of the shell is communicated with a slag discharge pipe for outputting solid waste slag.

In some technical schemes, the shell is divided into an upper chamber and a lower chamber by a sealing tube plate arranged in the shell, a plurality of microporous filter cores are arranged in the lower chamber, the top ends of the microporous filter cores are communicated with a connecting pipe, and the sealing tube plate is provided with a connecting hole corresponding to the microporous filter core, and the connecting hole is used for fixing the connecting pipe and communicating the upper chamber.

In some technical schemes, a liquid collecting groove is arranged on the sealing tube plate, a drain hole is formed in the bottom of the liquid collecting groove in a penetrating mode, and the drain hole is communicated with a drain hole for discharging solid sediments.

In some technical schemes, the liquid collecting groove is a rectangular groove or an arc-shaped groove, and the groove depth is between 5 and 20 mm.

In some technical schemes, the vertical height of the purifying liquid outlet on the shell from the sealing tube plate is 1/6-1/2 of the tangential height of the shell below the sealing tube plate, and the tangential height of the shell above the purifying liquid outlet is 100-500 mm.

In some technical schemes, a flexible limiter is connected to the inner wall of the lower cavity, a fixing needle is arranged at the bottom end of each microporous filter element, and the fixing needle is limited in a limiting hole correspondingly formed in the flexible limiter.

In some embodiments, the flexible retainer is a mesh structure, and/or; the fixing needle is at least one of a cylinder, a rectangular column and a rhombic column; and/or; the equivalent diameter of the fixing needle is 5-10mm, and the equivalent diameter of the limiting hole exceeds the equivalent diameter of the fixing needle by 1-3 mm; and/or; the length of the fixing needle is 10-55mm, and the vertical distance from the bottom end of the microporous filter element to the flexible stopper is 5-50 mm.

In some technical solutions, the method further includes: the first liquid level meter is used for sensing the liquid level of the purified liquid, and is arranged on the wall surface of the upper chamber within 200mm of the height of the purified liquid outlet, and/or; the second liquid level meter is used for sensing the liquid level of the slag discharging liquid and is arranged at a position 0-500mm away from the bottom end of the shell, and/or; the pressure taking ports at two ends of the differential pressure gauge are respectively arranged close to the top and bottom surfaces of the sealing tube plate, and/or; and the thermometer is arranged on the side wall of the lower cavity chamber with the distance of 100-200mm above the liquid inlet.

In some technical solutions, an outer filter medium and an inner filter medium are arranged inside the microporous filter element, the diameter of the inner filter medium is between the inner diameter of the outer filter medium and the inner diameter of the connecting pipe, the outer filter medium is an asymmetric metal powder sintered pipe and comprises an outer fine filter layer and an inner support layer, and the inner filter medium is a porous metal pipe.

In some technical schemes, the filtering thickness of the fine filtering layer is 0.1-1mm, the filtering pore diameter is 0.1-1um, the roughness Ra of the outer surface is less than or equal to 3.2um, the thickness of the supporting layer is 1.0-5.0mm, the pore diameter is 5-100 μm, and/or the inner filtering medium is constructed by a metal sintered wire mesh, a metal wedge wire or a punching plate, and the filtering pore diameter of the inner filtering medium is 100-1000 μm.

The utility model adopts the technical scheme and at least has the following beneficial effects:

1. the filtering device with the microporous filter element can effectively remove micro-nano solid particles in high-viscosity liquid so as to carry out high-purity processing on high value-added products;

2. the filter comprises a shell, a compressed air inlet pipe and a slag discharge pipe, wherein the compressed air inlet pipe is arranged on the top side of the shell, the slag discharge pipe is communicated with the bottom end of the shell, the compressed air carries with purified liquid to apply instantaneous reverse pressure difference to the microporous filter element from inside to outside, the filter element can vibrate slightly, the filter cake on the surface of the filter element is broken, the filter device is discharged from the slag discharge pipe along with the liquid, the purified liquid can quickly and reversely clean the filter cake which is difficult to peel off from the surface of the filter element, the microporous filter element is recovered as before, the service life of the filter element can be effectively prolonged, and the filter device can continuously and stably operate for a long period.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings and the reference numerals thereof used in the embodiments are briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a filtering apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic view of the sump according to an embodiment of the present invention;

fig. 3 is a schematic cross-sectional view of a microporous filter element according to an embodiment of the utility model.

The notations in the figures have the following meanings:

10-a housing; 11-a liquid inlet pipe; 12-a purified liquid outlet pipe; 13-emptying pipe; 14-a compressed air inlet pipe; 15-safety discharge pipe; 16-a slag discharge pipe; 17-emptying the tube;

20-a microporous filter element; 21-fine filtration layer; 22-a support layer; 23-an inner filter medium; 24-a connecting tube; 26-a fixed needle;

30-sealing the tube plate; 31-a sump; 32-exhaust holes;

40-a flexible stopper;

51-a first level gauge; 52-a second level gauge; 53-differential pressure gauge; 54-thermometer.

Detailed Description

In order to make the technical features, objects and effects of the present invention more clearly understood, a detailed description of embodiments of the present invention will be given below with reference to the accompanying drawings.

It should be noted that the terms "first" and "second" are used herein for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "multi-stage, multi-layer" means at least two stages/layers, e.g., two stages/layers, three stages/layers, etc.; and the term "and/or" is intended to include any and all combinations of one or more of the associated listed items.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Referring to fig. 1, a filtering apparatus suitable for microfiltration separation of high viscosity liquid is shown, which includes a casing 10 and a plurality of microporous filter elements 20 disposed in the casing, the casing 10 is divided into an upper chamber and a lower chamber by an inner sealing tube plate 30, the microporous filter elements 20 are disposed in the lower chamber, the top ends of the microporous filter elements 20 are communicated with a connecting tube 24, the sealing tube plate 30 is provided with a connecting hole for fixing the connecting tube 24 and communicating with the upper chamber, the lower side wall of the lower chamber is communicated with a liquid inlet tube 11, the upper chamber is communicated with a purified liquid outlet tube 12, a compressed gas inlet tube 14 and an emptying tube 13, for safety, the upper chamber is further communicated with a safety discharge tube 15, and the bottom end of the lower chamber is also communicated with a slag discharge tube 16.

In a specific embodiment, an automatic control valve for on-off control is correspondingly arranged on each pipeline for the requirements of on-off control and automatic program operation of the pipeline. In order to dynamically monitor the relevant control parameters of each operation time period of the filtering device, a first liquid level meter 51 used for purifying liquid level induction is designed, and the first liquid level meter 51 is arranged on the wall surface of an upper cavity within 200mm of the height of a purifying liquid outlet; the second liquid level meter 52 is used for sensing the liquid level of the slag discharging liquid, and the second liquid level meter 52 is arranged at a position which is 500mm away from the bottom end of the lower chamber by 100-; a differential pressure gauge 53 for detecting the differential pressure of filtration and backwashing, pressure taking ports at two ends of the differential pressure gauge 53 are respectively arranged near the top and bottom surfaces of the sealing tube plate 30; and a thermometer 54 for detecting the temperature of the inlet liquid, wherein the thermometer 54 is arranged on the side wall of the lower cavity chamber which is 100-200mm above the inlet liquid.

The operating principle of the filter device is described in detail as follows:

and (2) opening the feed valve, allowing high-viscosity liquid to flow into the lower chamber through the liquid inlet pipe 11, allowing the liquid to flow from bottom to top under the action of pressure difference at two ends of the top and bottom of the filtering device, allowing micro-nano solid particles contained in the liquid to be retained on the outer surface of the microporous filter element 20 when the liquid enters the region of the microporous filter element 20, allowing clean liquid to enter the microporous filter element 20, allowing the clean liquid to flow upwards and converge in the upper chamber, and when the first liquid level meter 51 detects the liquid level, closing the emptying valve and opening the purified liquid outlet valve, and allowing the filtering device to start a purified liquid output step.

The micro-nano solid particles trapped on the outer surface of the microporous filter element 20 form a filter cake, the filter cake gradually thickens along with the time, when the differential pressure gauge 53 detects that the filtering differential pressure reaches a set value, the feed valve and the purified liquid outlet valve are stopped, the compressed gas inlet valve is opened, after the pressure of the filtering device is consistent with the pressure of the backwashing equipment, the large-caliber residue discharge valve is opened, reverse differential pressure is formed inside and outside the microporous filter element 20 instantly, the microporous filter element 20 generates slight vibration under the action of sudden reverse differential pressure, and the filter cake formed on the surface of the microporous filter element 20 is broken and falls off, enters the liquid and is discharged out of the filtering device along with the liquid.

A small part of filter cakes which are not stripped from the surface of the microporous filter element 20 in the reverse differential pressure blasting can be quickly and reversely cleaned by the purified liquid in the filter device, so that the microporous filter element 20 is recovered to the initial state, when the liquid level in the filter device is reduced to be monitored by the second liquid level meter 52, the compressed gas inlet valve and the slag discharge valve are closed, then the emptying valve is opened, the compressed gas in the filter device is emptied, and the next filtration backwashing period can be circularly entered.

The micro-filtration and back-washing structure is designed in the embodiment, the service life of the filter element is effectively prolonged while the high-precision operation of the filter device is maintained, the defect that the existing micro-filtration technology cannot operate for a long period in the field of high-viscosity liquid-solid separation is overcome, the continuous operation can be carried out for more than 3 years, and the filter device has the advantage of long-period stable operation.

In yet another embodiment, the housing 10 is a cone structure at the bottom side of the upper column, wherein the cone angle of the cone is 60-120 °, and the distance between the liquid inlet and the bottom of the filter element is 200-; the vertical height of the purifying liquid outlet from the sealing tube plate 30 is 1/6-1/2 of the tangential height of the shell below the sealing tube plate 30, and the tangential height of the shell above the purifying liquid outlet is 100-500 mm. In this embodiment, the high liquid level design above the sealing tube plate 30 improves the amount of purified liquid for cleaning the filter element during the back washing process, and improves the regeneration efficiency of the filter element during the back washing process.

Referring to fig. 2, in a preferred embodiment, the sealing tube plate 30 is a porous disk-shaped structure, and is located between the upper and lower cavities of the casing 10, a plurality of connecting holes opened on the disk surface are welded or screwed with the connecting tubes 24, a liquid collecting tank 31 is arranged on the top surface of the sealing tube plate 30, the liquid collecting tank 31 is a rectangular or arc-shaped tank, the depth of the tank is between 5mm and 20mm, a drain hole 32 penetrating through the bottom of the tank is formed at the end of the liquid collecting tank 31, and the drain hole 32 is communicated with the drain tube 17 for discharging solid deposits. In this embodiment, the solid deposits on the sealing tube plate 30 can be periodically drained, so as to prevent the deposits from polluting the filter element during the back flushing process and reduce the reverse blockage probability of the filter element.

In another preferred embodiment, the microporous filter element further comprises a flexible stopper 40, the bottom end of each microporous filter element 20 is provided with a fixing pin 26, the fixing pin 26 is limited in a limiting hole correspondingly formed on the flexible stopper 40, the flexible stopper 40 is a porous disc structure or a porous mesh structure including a plurality of hollow parts, the edge of the flexible stopper is welded on the inner wall of the housing, the limiting hole is at least one of a circular hole, a square hole and a diamond hole, the equivalent diameter of the hole diameter exceeds the equivalent diameter of the fixing pin 26 by 1-3mm, and the equivalent diameter of the fixing pin 26 is 5-10 mm. In one embodiment, the length of the fixing needle 26 is 10-55mm, and the vertical distance from the bottom end of the microporous filter element 20 to the flexible stopper 40 is 5-50mm, so that the stopper structure has better stability. Through the design of flexible stopper 40 in this embodiment, in filter core vibrations in-process, the flexible stopper 40 of filter lower part can carry on spacingly to the filter core, avoids because of the vibration range is too big, takes place the mechanical damage of filter core collision, because it is flexible spacing, can allow the certain deformation of filter core, can not lead to filter core stress concentration and local fracture because of spacing tension.

Referring to fig. 3, in another embodiment, the microporous filter element 20 has an outer diameter of 30-80mm, a length of 1000-2000mm, an aspect ratio of 15-50: 1, most preferably 20-30: 1, inside filter medium and the interior filter medium 23 of setting up of micropore filter core 20, interior filter medium 23 diameter is between outer filter medium internal diameter and the connecting pipe 24 internal diameter, outer filter medium is asymmetric structure metal powder sintering pipe, including the fine filter layer 21 in the outside and the inboard supporting layer 22, fine filter layer 21 and supporting layer 22 pass through stainless steel metal powder cold isostatic pressing, the mode sintering of high-temperature sintering becomes an organic whole, fine filter layer 21's filtration thickness is 0.1-1mm, filter aperture is 0.1-1um, and surface roughness Ra is less than or equal to 3.2um, supporting layer 22 thickness is 1.0-5.0mm, aperture 5-100 mu m. The inner filter medium 23 is a porous metal tube configured as a sintered metal wire mesh, a wedge wire or a punched plate, and the filter pore size of the inner filter medium 23 is 100-1000 μm.

In the embodiment, the roughness of the outer surface of the filter medium outside the microporous filter element 20 is less than or equal to 3.2 microns, and the smooth outer surface of the filter element ensures that a high-viscosity filter cake is not easy to attach to the outer surface of the filter element, the filter cake is easy to fall off, and the backwashing reproducibility is good; the filter medium layer outside the filter element is of an asymmetric structure and consists of a fine filter layer 21 with high precision and small thickness and a support layer 22 with large aperture and high thickness, and has the characteristics of high filter precision, low pressure difference and high strength; when the outer filter medium is broken or leaked, a large amount of materials are instantly poured from the leakage part to enter the inner filter medium 23 and are rapidly blocked by catalyst particles, so that the broken filter element is rapidly locked, and the solid content after filtration is not increased and the whole filter is not failed; inner filter medium 23 provides the inner frame supporting role in the filter core inside, improves filter core bulk strength, reduces the fracture risk.

The filtering device provided by the application has the advantages of high precision, high operation stability and long-period operation, the solid content removal rate of the purified liquid obtained by practice is higher than 98%, and the purification efficiency is high; the operation pressure difference of the filtering device is lower than 100KPa, and the operation pressure difference is low; the continuous stable operation period is longer than 3 years, and the operation period is long. In practical industrial use, 2-10 filtering devices can be connected in parallel or divided into two groups of filtering devices with different precisions to be used in series, and the different filtering devices at the same stage are used for filtering and backwashing in turn so as to ensure the continuous filtration and separation of high-viscosity liquid and solid.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. The utility model provides a be suitable for filter equipment of high viscosity liquid solid micro-filtration separation which characterized in that, includes casing and the built-in at least one micropore filter core of casing, casing bottom side intercommunication has the feed liquor pipe, casing top side sets up the purifying liquid exit tube that is used for the purifying liquid output and is used for the compressed air inlet pipe of recoil air supply input, casing bottom intercommunication is used for the slag pipe of solid waste output.

2. The filter device for the microfiltration separation of the liquid and the solid of the high-viscosity liquid according to claim 1, wherein the housing is divided into an upper chamber and a lower chamber by a built-in sealing tube plate, the microporous filter elements are arranged in the lower chamber, the top ends of the microporous filter elements are communicated with a connecting pipe, and the sealing tube plate is provided with a connecting hole corresponding to the microporous filter element, and the connecting hole is used for fixing the connecting pipe and communicating the upper chamber.

3. The filter device for the microfiltration and separation of liquid and solid for high viscosity liquid according to claim 2, wherein a liquid collecting tank is arranged on the sealing tube plate, a drain hole is formed through the bottom of the liquid collecting tank, and the drain hole is communicated with a drain hole for discharging solid sediment.

4. A filter device suitable for the micro-filtration separation of liquid and solid of high viscosity liquid according to claim 3, wherein the liquid collecting tank is a rectangular or arc-shaped tank, and the depth of the tank is between 5-20 mm.

5. The filter device for the liquid-solid microfiltration separation of high viscosity liquid according to claim 2, wherein the vertical height of the purification liquid outlet on the shell from the sealing tube plate is 1/6-1/2 of the tangential height of the shell below the sealing tube plate, and the tangential height of the shell above the purification liquid outlet is 100-500 mm.

6. The filter device for the liquid-solid microfiltration separation of the high-viscosity liquid according to claim 2, wherein a flexible stopper is connected to the inner wall of the lower chamber, a fixing pin is installed at the bottom end of each microporous filter element, and the fixing pin is limited in a limiting hole correspondingly formed in the flexible stopper.

7. The filtering device for the microfiltration separation of the liquid and the solid of the high-viscosity liquid according to claim 6, wherein the flexible stopper is of a net structure,

and/or;

the fixing needle is at least one of a cylinder, a rectangular column and a rhombic column;

and/or;

the equivalent diameter of the fixing needle is 5-10mm, and the equivalent diameter of the limiting hole exceeds the equivalent diameter of the fixing needle by 1-3 mm;

and/or;

the length of the fixing needle is 10-55mm, and the vertical distance from the bottom end of the microporous filter element to the flexible stopper is 5-50 mm.

8. The filtering device for the liquid-solid microfiltration separation of the high viscosity liquid according to claim 2, further comprising:

a first liquid level meter used for the liquid level induction of the purified liquid, wherein the first liquid level meter is arranged on the wall surface of the upper chamber within 200mm of the height of the purified liquid outlet,

and/or;

a second liquid level meter used for sensing the liquid level of the slag discharging liquid, the second liquid level meter is arranged at a position 0-500mm away from the bottom end of the shell,

and/or;

a differential pressure meter for detecting the differential pressure of filtration and backwashing, pressure taking ports at two ends of the differential pressure meter are respectively arranged near the top and the bottom of the sealing tube plate,

and/or;

and the thermometer is arranged on the side wall of the lower cavity chamber with the distance of 100-200mm above the liquid inlet.

9. The filter device for the micro-filtration separation of liquid and solid in high viscosity liquid according to claim 2, wherein the micro-porous filter element is internally provided with an outer filter medium and an inner filter medium, the diameter of the inner filter medium is between the inner diameter of the outer filter medium and the inner diameter of the connecting pipe,

the outer filter medium is an asymmetric structure metal powder sintered tube and comprises a fine filter layer on the outer side and a support layer on the inner side, and the inner filter medium is a porous metal tube.

10. The filtering device for the micro-filtration separation of liquid and solid of high viscosity liquid according to claim 9,

the filtration thickness of the fine filtration layer is 0.1-1mm, the filtration pore diameter is 0.1-1um, the roughness Ra of the outer surface is less than or equal to 3.2um, the thickness of the support layer is 1.0-5.0mm, the pore diameter is 5-100 mu m, and/or

The inner filter medium is constructed by a metal sintered wire mesh, a metal wedge wire or a perforated plate, and the filter pore size of the inner filter medium is 100-1000 mu m.

Images