CN109847490B - Rigid gas-liquid coalescent filter element, preparation method and device thereof - Google Patents
Rigid gas-liquid coalescent filter element, preparation method and device thereof Download PDFInfo
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- CN109847490B CN109847490B CN201910212399.2A CN201910212399A CN109847490B CN 109847490 B CN109847490 B CN 109847490B CN 201910212399 A CN201910212399 A CN 201910212399A CN 109847490 B CN109847490 B CN 109847490B
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Abstract
The invention provides a rigid gas-liquid coalescence filter element, a preparation method and a device thereof, wherein the filter element comprises: a coalescing layer surrounding the outside of the central inlet channel for coalescing and separating droplets in the gas flowing in through the inlet channel; the liquid draining layer surrounds the outer side of the aggregation layer and is used for providing a liquid draining channel for the coalesced liquid drops; the gas-liquid coalescent filter element comprises a first flexible material, a second flexible material, a liquid drainage layer, a first adhesive-containing flexible material, a second adhesive-containing flexible material, a first adhesive-containing flexible material and a second adhesive-containing flexible material, wherein the first flexible material and the second flexible material are formed by drying and solidifying the first adhesive-containing flexible material, and the adhesive solution is obtained by passing through the first flexible material and the second flexible material through vacuum suction.
Description
Technical Field
The invention relates to the technical field of gas-liquid filtration, in particular to a rigid gas-liquid coalescence filter element, a preparation method and a device thereof.
Background
Process gases such as natural gas, coalbed gas and dry gas seal gases generally contain liquid impurities which affect the safe operation of downstream related instruments and equipment, so that liquid drops in the gases need to be filtered, and the filtering is usually performed under high-pressure working conditions (for example, the natural gas needs to be pressurized by a gas compression station and then transported, and the pressure in the east-west gas transportation line is 12 MPa). For droplets having a particle size of 0.1 to 1 μm, a coalescing filter is generally used for filtration, which is generally used downstream of the vane separator, mist catcher and filter separator, through which large droplets in the gas are removed and small droplets are removed by the coalescing filter.
Existing coalescing filters consist of an inner frame and a fibrous filter layer. The inner frame is usually formed by processing a metal material, is a porous tubular structure, and can provide support for the fiber filter layer. The fibrous filtration layer comprises a coalescing layer and a drainage layer. The coalescing layer and drainage layer may act to filter the droplets, both in a multi-layer wound form. Current coalescing layers are typically made of fiberglass materials and drainage layers are typically made of needled felt materials. The aggregation layer has an aggregation effect on small liquid drops in the incoming gas, and the small liquid drops gradually aggregate into large liquid drops under the effects of inertia, diffusion and interception after impacting the fiber. The liquid draining layer has the function of providing a liquid draining channel for liquid, so that the coalesced liquid can be smoothly drained out of the filter element under the action of gravity, and the occurrence of the phenomenon of secondary entrainment is reduced.
Coalescing filters commonly used today are all wrapped from flexible materials. The flexible material has no compressive strength, can be compressed and deformed under high pressure, and the internal structure of the filter material can be seriously deformed, so that the pore structure is changed, the coalescence and drainage processes are affected, and the filtering effect is not ideal. In addition, under the high-pressure working condition, the gas density is greatly increased, the buoyancy of liquid drops is increased, the liquid discharge speed in the liquid discharge layer is relatively slowed down, accumulated liquid is formed in the liquid discharge layer, the accumulated liquid amount is increased, the gas flow area is reduced, the gas speed flowing through the liquid discharge layer is increased, the scouring action of gas on the liquid in the liquid discharge layer is enhanced, and when the accumulated liquid amount reaches a certain degree, namely, the accumulated liquid amount is saturated, serious secondary entrainment can be caused. In addition, the material of the inner frame is usually metal, if the gas and the liquid drop contain corrosive components, the frame is easily broken, and the filter is disabled.
Disclosure of Invention
The invention aims to provide a rigid gas-liquid coalescence filter element, which improves the strength of the gas-liquid coalescence filter element so as to meet the requirement of high-pressure working conditions. Another object of the invention is to provide a method for preparing a rigid gas-liquid coalescing filter element. It is still another object of the present invention to provide a device for preparing a rigid gas-liquid coalescing filter cartridge.
To achieve the above object, one aspect of the present invention discloses a rigid gas-liquid coalescing filter cartridge, comprising:
a coalescing layer surrounding the outside of the central inlet channel for coalescing and separating droplets in the gas flowing in through the inlet channel; and
A liquid discharge layer surrounding the outside of the coalescing layer for providing a liquid discharge channel for the coalesced liquid droplets;
The aggregation layer is formed by drying and solidifying a first flexible material containing an adhesive, the drainage layer is formed by drying and solidifying a second flexible material containing an adhesive, and the first flexible material containing an adhesive and the second flexible material containing an adhesive are obtained by enabling an adhesive solution to pass through the first flexible material and the second flexible material through vacuum suction.
Preferably, the cartridge further comprises a pre-separation layer provided on the side of the coalescing layer adjacent to the inlet passage.
Preferably, the pre-separation layer is formed by drying and solidifying a third flexible material containing a binder, and the third flexible material containing the binder is obtained by passing a binder solution through the third flexible material through vacuum suction.
Preferably, the pre-separation layer is in a multi-layer wound form or a folded-around form.
Preferably, the third flexible material is ceramic fiber or non-woven fabric.
Preferably, the coalescing layer and/or the drainage layer is in a multi-layer wound form or a folded-around form.
Preferably, the material of the aggregation layer is glass fiber, polyester fiber or polypropylene fiber.
Preferably, the material of the liquid discharge layer is needled felt.
Preferably, the binder is one or more of silica sol, water glass, aluminum sol, polyvinyl alcohol or polyethylene glycol.
The invention also discloses a preparation method of the rigid gas-liquid coalescing filter element, which comprises the following steps:
sequentially surrounding and fixing a first flexible material and a second flexible material on a porous mold;
Connecting one end of the opening of the porous mold with a liquid storage tank;
connecting the liquid storage tank with a vacuum pump;
placing the porous mold in a binder solution such that at least a portion of the first and second flexible materials on the porous mold are immersed in the binder solution;
Starting the vacuum pump to suck so that the adhesive solution sequentially passes through the second flexible material and the first flexible material and enters a liquid storage tank through a through hole on the porous die to obtain a first flexible material containing an adhesive and a second flexible material containing the adhesive;
Removing the porous mold from the binder solution and continuing to draw through the vacuum pump;
And drying and solidifying the first flexible material containing the adhesive and the second flexible material containing the adhesive on the porous mould, and removing the dried and solidified first flexible material and second flexible material from the porous mould to obtain the rigid gas-liquid coalescent filter element.
Preferably, the method further comprises circumferentially securing a third flexible material to the porous mold prior to sequentially circumferentially securing the first flexible material and the second flexible material to the porous mold.
Preferably, the placing the porous mold in a binder solution, so that at least part of the first flexible material and the second flexible material on the porous mold is immersed in the binder solution specifically includes:
When the porous mold is placed in a binder solution such that portions of the first and second flexible materials are immersed in the binder solution, the porous mold is rotated such that portions of the flexible materials that are not immersed in the binder solution are sequentially immersed in the binder solution.
The invention also discloses a preparation device of the rigid gas-liquid coalescing filter element, which comprises the following steps:
A solution tank for holding a binder solution;
A porous mold for supporting a flexible material for forming the cartridge;
the liquid storage tank is communicated with the porous die through a pipeline;
and the vacuum pump is communicated with the liquid storage tank through a pipeline.
Preferably, the device further comprises a rotation device;
the rotating device is used for rotating the porous mold.
The invention provides a rigid gas-liquid coalescing filter element. The coalescing layer and the drain layer in the coalescing filter element are dried and solidified through a first flexible material and a second flexible material containing a binder to form the rigid gas-liquid coalescing filter element. The flexible material forming the aggregation layer and the drainage layer is provided with a small amount of adhesive by passing through the adhesive solution through vacuum suction, the adhesive is remained at the contact point between the fibers, and the fibers are solidified together after the adhesive is dried and solidified, so that the rigidity of the flexible material can be improved, the aggregation layer and the drainage layer have certain compression strength, and the original pore structure of the flexible material can be maintained, so that the rigid gas-liquid aggregation filter element can normally work under a high-pressure working condition. In addition, the rigid gas-liquid coalescence filter element is of a rigid structure, so that self-support can be realized, an inner framework is not required to be arranged for supporting, and the cost can be reduced.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 illustrates a front cross-sectional view of one embodiment of a rigid gas-liquid coalescing filter cartridge of the present invention;
FIG. 2 illustrates a top cross-sectional view of one embodiment of a rigid gas-liquid coalescing filter cartridge of the present invention;
FIG. 3 shows an enlarged view of region A of FIG. 2;
FIG. 4 is a schematic illustration of the flexible material of a rigid gas-liquid coalescing filter cartridge of the present invention after fiber-to-fiber consolidation;
FIG. 5 shows an enlarged view of fibers in the flexible material of the rigid gas-liquid coalescing filter cartridge of the present invention after consolidation of the fibers;
FIG. 6 illustrates one of the flow charts of one embodiment of a method of making a rigid gas-liquid coalescing filter cartridge of the present invention;
FIG. 7 illustrates a second flow chart of one embodiment of a method of making a rigid gas-liquid coalescing filter cartridge in accordance with the present invention;
fig. 8 shows a schematic of a device for preparing a rigid gas-liquid coalescing filter cartridge in accordance with the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
According to one aspect of the present invention, a rigid gas-liquid coalescing filter cartridge is disclosed. As shown in fig. 1-3, in this embodiment, the rigid gas-liquid coalescing filter cartridge includes a coalescing layer 20 and a drain layer 30. The coalescing layer 20 surrounds the outside of the central inlet channel for coalescing and separating droplets of gas flowing in through the inlet channel, and the drain layer 30 surrounds the outside of the coalescing layer 20 for providing a drain channel for droplets of gas coalesced after passing through the coalescing layer 20.
The coalescing layer 20 is formed by drying and solidifying a first flexible material containing a binder, the drain layer 30 is formed by drying and solidifying a second flexible material containing a binder, and the first flexible material containing a binder and the second flexible material containing a binder are obtained by vacuum pumping a binder solution 1 through the first flexible material and the second flexible material.
The invention provides a rigid gas-liquid coalescing filter element. The coalescing layer 20 and the drain layer 30 in the coalescing filter element of the present invention are dried and consolidated by the first flexible material and the second flexible material, respectively, containing the binder to form a rigid gas-liquid coalescing filter element. The flexible material forming the coalescing layer 20 and drainage layer 30 is passed through by vacuum suction with a small amount of binder solution 1 adhering thereto, the binder remaining at the points of contact 50 between the fibers 40 and 40, and after drying and consolidation of the binder, the fibers 40 and 40 are consolidated together as shown in fig. 4 and 5. The rigidity of the flexible material can be improved by attaching and solidifying the adhesive at the contact points 50 between the fibers 40 and the fibers 40, so that the coalescing layer 20 and the drain layer 30 have certain compressive strength, and meanwhile, the original pore structure of the flexible material can be maintained, so that the rigid gas-liquid coalescing filter element can work normally under the high-pressure working condition. In addition, the coalescing layer 20 and the drain layer 30 of the rigid gas-liquid coalescing filter element have certain rigidity, can realize self-support, do not need to be provided with an inner framework to provide support, and can reduce cost.
In a preferred embodiment, the cartridge further comprises a preseparation layer 10 provided on the side of the coalescing layer 20 adjacent to the inlet channels. In the gas-liquid coalescence process, the liquid drops which are trapped by the filter element enter the downstream air flow again due to the scouring action of the air flow to form a secondary entrainment phenomenon, so that the concentration of the liquid drops in the downstream air flow is increased, the filtration efficiency is reduced, and the phenomenon is very easy to occur in micron-sized liquid drops. By providing the pre-separation layer 10, large droplets in the air flow of the air inlet channel can be primarily separated, and the liquid accumulation in the coalescing layer 20 and the drain layer 30 can be reduced, thereby reducing the secondary entrainment phenomenon of the filter element.
In a preferred embodiment, the pre-separation layer 10 is formed by drying and solidifying a third flexible material containing a binder, and the third flexible material containing the binder is obtained by passing the binder solution 1 through the third flexible material by vacuum suction. The binder solution 1 is vacuum pumped such that the binder solution 1 passes through the third flexible material and then dried and consolidated to form the pre-separation layer 10, providing the pre-separation layer 10 with a certain stiffness. The preseparation layer 10 can provide a certain supporting function for the coalescence layer 20 and the drainage layer 30, so that the internal framework in the existing filter element can be replaced, and the filter element can be effectively prevented from being damaged due to liquid corrosion.
In a preferred embodiment, the coalescing layer 20 surrounds the inlet passage and the drainage layer 30 surrounds the coalescing layer 20. The wrapping form may include two kinds, i.e., a multi-layer wrapping form and a folded wrapping form. The coalescing layer 20 and the drainage layer 30 may take any of a multi-layer wrap around form and a folded wrap around form. The coalescing layer 20 may be formed by wrapping the first flexible material around the inlet passage in multiple layers, or by folding the first flexible material first and then wrapping the folded first flexible material around the coalescing layer 20 to form the coalescing layer 20 in a folded around configuration, as shown in fig. 3. Similarly, the liquid draining layer 30 and the pre-separating layer 10 may be wound in multiple layers, or may be wound in a folded manner, or may be arranged according to practical situations, which is not limited in the present invention.
In a preferred embodiment, the first flexible material may be selected from glass fibers 40, polyester fibers 40, or polypropylene fibers 40. The thickness of the first flexible material is preferably between 0.3 and 1mm and the average pore size is preferably between 1 and 20 μm.
The second flexible material can be selected from needled felt, such as aramid needled felt, terylene needled felt, polypropylene needled felt, and the like. The thickness of the first flexible material is preferably 1 to 3mm and the average pore diameter is preferably 20 to 100 μm.
The third flexible material may be ceramic fiber 40 or non-woven fabric. The thickness of the third flexible material is preferably 0.5 to 3mm and the average pore diameter is preferably 20 to 150 μm.
The pore sizes of the flexible materials of pre-separation layer 10, coalescing layer 20 and drainage layer 30 are different, with the pores of coalescing layer 20 being smaller and the pore sizes of pre-separation layer 10 and drainage layer 30 being larger. The pre-separation layer 10 plays a role in pre-separation, and larger pores of the pre-separation layer 10 can separate larger liquid drops in the gas; the pores of the coalescing layer 20 are smaller, and small droplets in the gas coalesce into large droplets when penetrated under the barrier of the smaller pores; the liquid discharge layer 30 has a larger aperture, and the addition of the liquid discharge layer 30 is beneficial to the smooth liquid discharge of the coalesced large liquid drops under the action of gravity while the pressure drop of the filter element is not increased.
In a preferred embodiment, the binder may be one or more of silica sol, water glass, alumina sol, polyvinyl alcohol or polyethylene glycol, and the like. The selected binder curing mode is all dried, dehydrated and cured, the drying temperature can be selected to be 80-150 ℃, and the drying time can be selected to be 5-12 h. Preferably, the drying method can be selected to be dried by a microwave method, so that the drying time can be shortened to 10-20 min, and the problem of uneven distribution of the binder caused by migration of the binder solution to the surface of the filter element under the action of heat and capillary action before the binder solution is solidified in the common drying process can be solved. Of course, in practical applications, other binders that can increase the rigidity of the flexible material can be used and the corresponding drying temperature and time can be selected, which is not limited by the present invention.
In this embodiment, the materials, thicknesses, and pore sizes of the first flexible material, the second flexible material, and the third flexible material are given as examples, and in practical applications, other flexible materials and thicknesses and pore sizes of the flexible materials may be selected according to practical situations, which is not limited in the present invention.
According to another aspect of the invention, the embodiment also discloses a preparation method of the rigid gas-liquid coalescing filter element. As shown in fig. 6, in this embodiment, the method includes:
S100: the first flexible material and the second flexible material are sequentially fixed around the porous mold 2. For example, when coalescing layer 20 is in the form of a multi-layer wrap, the first flexible material may be wrapped around and secured to porous mold 2 layer by layer, preferably 4 to 8 layers.
When the drainage layer 30 is in the form of a folded loop, the second flexible material may be folded first and then the folded second flexible material may be secured around the outside of the coalescing layer 20.
Preferably, the first flexible material and the second flexible material may be fixed to the outside of the porous mold 2 in the form of glue. More preferably, the adhesive form of spot bonding may be adopted, that is, the adhesive is applied once at preset intervals to fix the spot bonding. For example, the first flexible material is fixed on the porous mold 2 by gluing, a small amount of glue can be smeared on the inner side of the flexible material by a glue gun every 1-10 cm, and then the flexible material is tightly pressed and fixed. Then the folding length of the second flexible material can be folded once every 5-30 mm, and can be folded 120-360 times in a circle, and after the second flexible material is wound on the outer side of the liquid draining layer 30, the head and the tail of the second flexible material are glued and fixed together in a gluing mode.
S200: one end of the opening of the porous mold 2 is connected with a liquid storage tank 3. The porous mold 2 comprises one open end, the other end is a closed end, and the open end can be used for connecting the liquid storage tank 3. The porous mold 2 is formed with a plurality of through holes, the aperture of the through holes is preferably 2-5 mm, and the distance between the through holes is 10-50 mm. In a preferred embodiment, before the flexible material is wound and fixed on the porous mold 2, a similar lubricating substance such as glycerin can be coated on the porous mold 2, so that the filter element can be conveniently and smoothly removed from the porous mold 2 after being dried.
S300: the reservoir 3 is connected to a vacuum pump 4. The vacuum pump 4 may draw a vacuum that may cause the binder solution 1 to pass through the flexible material.
S400: the porous mold 2 is placed in a binder solution 1 such that at least part of the first and second flexible materials on the porous mold 2 are immersed in the binder solution 1. The binder can be one or more of silica sol, water glass, aluminum sol, polyvinyl alcohol or polyethylene glycol and the like. The binder solution 1 may be formed by mixing the binder with water in proportion.
S500: and starting the vacuum pump 4 to suck so that the adhesive solution 1 sequentially passes through the second flexible material and the first flexible material and enters the liquid storage tank 3 through the through holes on the porous die 2 to obtain the first flexible material containing the adhesive and the second flexible material containing the adhesive. The air speed of the air flowing through the filter element can be controlled by adopting a mass flow controller in the sucking process of the vacuum pump 4, and the preferable air speed is controlled to be 1-30 m/min.
S600: the porous mold 2 is removed from the binder solution 1 and continues to be pumped through the vacuum pump 4. The porous mould 2 is taken out of the binder solution 1, a large amount of binder is contained in the flexible material, the flexible material is continuously pumped by the vacuum pump 4, a large amount of binder can be taken away, only a small amount of binder stays at the contact point 50 between the fibers 40 and the fibers 40, and the amount of the binder staying at the contact point 50 can be controlled by controlling the air speed and the final pumping time, so that the strength and pore diameter change of the filter element after solidification can be regulated. Preferably, the flexible material is taken out after being rotated 5 to 30 turns in the binder solution 1 and the suction is continued for 5 to 60 seconds. The pore diameter of the filter element can be regulated and controlled by changing the concentration, the suction air speed, the suction times and other parameters of the binder solution 1.
S700: and drying and solidifying the first flexible material containing the adhesive and the second flexible material containing the adhesive on the porous mould, and removing the dried and solidified first flexible material and second flexible material from the porous mould to obtain the rigid gas-liquid coalescent filter element. In a preferred embodiment, if it is desired to continue to increase the strength of the filter element after forming and to reduce the pore size of each layer of filter material after drying is completed, steps S500-S700 may be repeated again until the rigidity requirement of the filter element is met.
In a preferred embodiment, as shown in fig. 7, the method further comprises, before the first flexible material and the second flexible material are successively fixed around the porous mold 2:
s000: a third flexible material is fixed around the porous mould 2. At this time, the first flexible material may be fixed to the porous mold 2 by being fixed to the third flexible material.
When the pre-separation layer 10 is provided in a multi-layer winding form, a third flexible material may be multi-layer wound on the porous mold 2. The third flexible material can be fixed on the porous mold 2 by gluing, and the gluing mode can be preferably spot-jointed, namely, a small amount of glue is smeared on the inner side of the tail end of the flexible material by a glue gun at preset intervals, and then the flexible material is fixed by pressing with force. The preset distance is preferably in the range of 1 to 10cm.
Preferably, the first flexible material of coalescing layer 20 may be seamlessly joined with the third flexible material of pre-separation layer 10.
In a preferred embodiment, when the porous mold 2 is placed in the binder solution 1 such that the portions of the first and second flexible materials are immersed in the binder solution 1 in S400, the porous mold 2 is rotated such that the portions of the flexible materials not immersed in the binder solution 1 are sequentially immersed in the binder solution 1.
When the flexible material on the porous mold 2 is partially immersed in the binder solution 1, the flexible material on the porous mold 2 can be rotated by rotating the porous mold 2 and the flexible material of different portions is sequentially immersed in the binder solution 1 so that each portion of the flexible material can retain the binder.
According to still another aspect of the present invention, this embodiment also discloses a preparation device of the rigid gas-liquid coalescing filter element. As shown in fig. 8, in this embodiment, the preparation apparatus includes a solution tank, a porous mold 2, a liquid reservoir 3, and a vacuum pump 4.
Wherein the solution tank is used for containing the binder solution 1.
The porous mould 2 is used to support a flexible material for forming the filter cartridge.
The liquid storage tank 3 is communicated with the porous die 2 through a pipeline.
The vacuum pump 4 is communicated with the liquid storage tank 3 through a pipeline.
In a preferred embodiment, the device further comprises a rotation device. The rotating means is for rotating the porous mold 2. When the flexible material on the porous mold 2 is partially immersed in the binder solution 1, the porous mold 2 may be rotated by a rotating device so that the flexible material on the porous mold 2 can be rotated and different portions of the flexible material are sequentially immersed in the binder solution 1 so that each portion of the flexible material can retain the binder. In fig. 8, the arrow corresponding to the porous mold 2 is the rotation direction of the porous mold 2, and the other arrows are the flow direction of the binder solution.
The invention is further illustrated by the following specific example. In a specific example, ceramic fibers 40 are selected as the filter material of the pre-separation layer 10, the thickness of the filter material is 1mm, and the average pore diameter is 25 μm; the filter material of the aggregation layer 20 is glass fiber 40, the thickness of the filter material is 0.5mm, and the average pore diameter is 3.7 mu m; the drainage layer 30 is made of needled felt, the thickness of the filter material is 3mm, and the average pore diameter is 30 mu m. The pore diameter of the holes on the porous mold 2 is 3mm, and the pitch of the holes is 25mm.
A small amount of glycerin is uniformly smeared on the surface of the porous mould 2. Then the pre-separation layer 10 filter material is wound on the porous mold 2 for 2 layers, the tail ends are fixed by gluing in a point connection mode, namely, a small amount of glue is smeared on the inner side of the tail ends of the filter material every 3cm by using a glue gun, and then the filter material is tightly pressed for fixing. The head end of the filter material of the aggregation layer 20 is in seamless connection with the tail end of the pre-separation layer 10, 4 layers are wound, the tail end is fixed by gluing, the gluing mode is point connection, namely, a small amount of glue is smeared on the inner side of the tail end of the filter material every 3cm by using a glue gun, and then the filter material is tightly pressed for fixing.
The liquid draining layer 30 is folded, the folding length is 15mm, the folding number is 240, the liquid draining layer 30 is tightly wound outside the coalescing layer 20, and the first section and the tail end of the liquid draining layer 30 are connected in an adhesive mode.
The whole structure is half immersed in the binder solution 1, the binder is water glass, all filter materials are wetted by adopting a vacuum suction mode, the suction speed is 5m/min, and the filter materials are taken out and continuously sucked for 10s after rotating for 20 circles.
And (3) placing the porous mold 2 and the filter element on the porous mold into a drying oven for drying at the temperature of 100 ℃ for 10 hours, and taking down the dried and solidified first flexible material, second flexible material and third flexible material from the porous mold to obtain the rigid gas-liquid coalescent filter element.
The rigid gas-liquid coalescent filter element prepared in the specific example has the compression strength of 8.5MPa, the pressure drop of 0.96kpa under the filtration gas speed of 0.1m/s under the room temperature environment, and the filter element does not deform obviously under the pressure condition of 5MPa, and the concentration of outlet liquid drops is basically consistent with that under normal pressure after detection, so that the phenomenon of secondary entrainment caused by high pressure does not occur basically.
According to the invention, a small amount of binder is adsorbed at the contact point 50 between the fibers 40 and 40 of the flexible material of the filter element by adopting vacuum suction, so that the fiber 40 is fixed, the original pore structure of the filter element is basically not influenced, and the whole filter element is made into a rigid structure, so that deformation under high pressure can be prevented, and the reduction of the filtering performance is prevented. Self-supporting can also be realized, a metal inner framework or an outer framework is not needed, and the weight of the filter element is reduced, so that the acting force on a tube plate for loading the filter element is reduced. In addition, the rigid gas-liquid coalescing filter element is less expensive to manufacture than conventional filter elements.
The drainage layer 30 is folded, so that the filtering area of the filter element can be greatly increased. On the one hand, the increase of the filtering area relatively increases the saturated liquid accumulation amount of the liquid discharge layer 30, so that the liquid can be discharged downwards for a sufficient time before the liquid discharge layer 30 reaches the saturated liquid accumulation amount, and the serious secondary entrainment phenomenon caused by the slow liquid discharge speed under high pressure can be effectively relieved. On the other hand, the filtering area is increased, the apparent gas velocity is relatively reduced, so that the scouring action of the gas flow on large liquid drops in the liquid discharge layer 30 is reduced, and the occurrence of the secondary entrainment phenomenon can be restrained. The filter element has certain strength in each layer, so that a metal inner framework for supporting is not needed, the damage of the filter element caused by corrosion is effectively prevented, meanwhile, the pre-separation layer can be used for carrying out primary separation on large liquid drops in gas, and the accumulated liquid quantity in the aggregation layer and the liquid discharge layer can be reduced, so that the secondary entrainment phenomenon is reduced.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.
Claims (12)
1. A method of making a rigid gas-liquid coalescing filter cartridge comprising:
Sequentially surrounding and fixing a first flexible material and a second flexible material on a porous mold, wherein a plurality of layers of wound coalescing layers are formed by winding the first flexible material around an air inlet channel in a multi-layer manner, or the first flexible material is folded first, and then the folded first flexible material is wound around the coalescing layers to form a folded coalescing layer in a surrounding manner;
Connecting one end of the opening of the porous mold with a liquid storage tank;
connecting the liquid storage tank with a vacuum pump;
placing the porous mold in a binder solution such that at least a portion of the first and second flexible materials on the porous mold are immersed in the binder solution;
Starting the vacuum pump to suck so that the adhesive solution sequentially passes through the second flexible material and the first flexible material and enters a liquid storage tank through a through hole on the porous die to obtain a first flexible material containing an adhesive and a second flexible material containing the adhesive;
Removing the porous mold from the binder solution and continuing to draw through the vacuum pump;
And drying and solidifying the first flexible material containing the adhesive and the second flexible material containing the adhesive on the porous mould, and removing the dried and solidified first flexible material and second flexible material from the porous mould to obtain the rigid gas-liquid coalescent filter element.
2. The method of manufacturing according to claim 1, further comprising surrounding securing a third flexible material to the porous mold prior to surrounding securing the first flexible material and the second flexible material in sequence to the porous mold.
3. The method of claim 1, wherein the placing the porous mold in a binder solution, immersing at least a portion of the first and second flexible materials on the porous mold in the binder solution, comprises:
When the porous mold is placed in a binder solution such that portions of the first and second flexible materials are immersed in the binder solution, the porous mold is rotated such that portions of the flexible materials that are not immersed in the binder solution are sequentially immersed in the binder solution.
4. A rigid gas-liquid coalescing filter cartridge produced by the method of any one of claims 1-3, comprising:
a coalescing layer surrounding the outside of the central inlet channel for coalescing and separating droplets in the gas flowing in through the inlet channel; and
A liquid discharge layer surrounding the outside of the coalescing layer for providing a liquid discharge channel for coalesced droplets;
the adhesive-containing flexible material comprises a first aggregation layer, a second aggregation layer and a second aggregation layer, wherein the aggregation layer is formed by drying and solidifying a first flexible material containing an adhesive, the drainage layer is formed by drying and solidifying a second flexible material containing an adhesive, and the first flexible material containing the adhesive and the second flexible material containing the adhesive are obtained by enabling an adhesive solution to pass through the first flexible material and the second flexible material through vacuum suction;
Wherein the thickness of the first flexible material is 0.3 mm-1 mm, and the average pore diameter is 1 mu m-20 mu m; the thickness of the second flexible material is 0.5 mm-3 mm, and the average pore diameter is 20 mu m-100 mu m.
5. The rigid gas-liquid coalescing filter cartridge of claim 4, further comprising a pre-separation layer disposed on a side of the coalescing layer adjacent the inlet passage.
6. The rigid gas-liquid coalescing filter cartridge of claim 5 wherein the pre-separation layer is formed by dry consolidation of a third flexible material comprising a binder, the third flexible material comprising a binder solution being obtained by passing a binder solution through the third flexible material by vacuum suction.
7. The rigid gas-liquid coalescing filter cartridge of claim 5 or 6 wherein the pre-separation layer is in a multi-layer wrapped form or a folded-around form.
8. The rigid gas-liquid coalescing filter cartridge of claim 6 wherein the third flexible material is ceramic fiber or non-woven fabric.
9. The rigid gas-liquid coalescing filter cartridge of claim 4 wherein the coalescing layer and/or the drainage layer is in a multi-layer wrapped or folded-around form.
10. The rigid gas-liquid coalescing filter cartridge of claim 4 or 9 wherein the coalescing layer material is fiberglass, polyester or polypropylene.
11. The rigid gas-liquid coalescing filter cartridge of claim 4 or 9 wherein the drainage layer is a needled felt.
12. The rigid gas-liquid coalescing filter cartridge of claim 4 wherein the binder is one or more of silica sol, water glass, alumina sol, polyvinyl alcohol, or polyethylene glycol.
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| CN111389129B (en) * | 2020-04-10 | 2021-10-15 | 江苏盛伟燃气科技有限公司 | Interior formula coalescence filter core that advances outward |
| CN112675635A (en) * | 2020-11-20 | 2021-04-20 | 苏州达菲特过滤技术股份有限公司 | Oil-gas separator filter element structure and preparation method thereof |
| CN112973295B (en) * | 2021-03-18 | 2022-03-29 | 中国石油大学(北京) | Coalescence filter core with flowing back function |
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