CN103089714B - Turbine gas compressor front end deduster and filter element thereof - Google Patents
Turbine gas compressor front end deduster and filter element thereof Download PDFInfo
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- CN103089714B CN103089714B CN201310024020.8A CN201310024020A CN103089714B CN 103089714 B CN103089714 B CN 103089714B CN 201310024020 A CN201310024020 A CN 201310024020A CN 103089714 B CN103089714 B CN 103089714B
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- filtration membrane
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Abstract
The invention discloses a kind of turbine gas compressor that can effectively improve and use turbine gas compressor front end deduster and filter element thereof that scale problems occurs for a long time.This front end deduster comprises shell, is arranged on the filter element in shell and acts on the back-blowing dust removing device of filter element, described shell and filter element are connected by orifice plate and form first space and second space of separating, the transmission of gas to be filtered occurs in the first space, and the transmission of filtering gas occurs in second space; Filter element has the filtering material be made up of high density porous polyethylene support and the expanded PTFE filtration membrane that is adhering closely to high density porous polyethylene supporting body surface; Described expanded PTFE filtration membrane treats the eliminating rate of the dust of particle diameter >=0.5 in filtering gas μm more than 99%.Filtering material of the present invention can the high filtering precision of stable for extended periods of time, effectively improve turbine gas compressor use for a long time under scale formation.
Description
Technical field
The present invention relates to gas filtration technical field, be specifically related to turbine gas compressor front end deduster and filter element thereof.
Background technique
Gas compressor is broadly divided into positive displacement and the large class of turbine-type two from working principle.Positive displacement gas compressor relies on mechanical motion directly make the Volume Changes of gas thus reach supercharging object, and it is mainly used in the occasion of medium-small flow at present.First turbine gas compressor relies on the impeller of High Rotation Speed to be improved by the flow velocity of gas, and then makes high velocity air rapid reduction of speed thus reach supercharging object in Diffuser, and it is mainly used in the occasion of large discharge at present.
Existing turbine gas compressor mainly comprises centrifugal, axial flow, diagonal flow type and combined type.Usually front end deduster is also provided with before these turbine gas compressors.The effect of front end deduster carries out udst separation to the gas being about to enter turbine gas compressor, to make the dust content in gas decline, avoids the use of dust exceeding to turbine gas compressor to cause adverse effect.
At present, turbine gas compressor front end deduster almost all adopts filter drum type precipitator or fiber bag precipitator.Filter drum type precipitator adopts filter cylinder to be filter element, and fiber bag precipitator then adopts cloth bag to be filter element.Filter cylinder to be folded into after wrinkle the bonding one-tenth cylinder of head and the tail again by filtering material, and the inside metal truss of cylinder supports, fixing with top cover and base up and down of cylinder.The synthetic filter performance of filtering material to filter drum type precipitator plays determinant factor.Fiber bag precipitator is also like this.
The subject matter of turbine gas compressor is that after long-time use, compressor operating vibration values raises, and cooler heat exchanger efficiency reduces.Find through checking, the parts foulings such as the impeller in compressor, cooler fin and runner are the immediate causes causing this problem.For this problem, most enterprise has to carry out maintenance snaking to compressor frequently, causes the useful working life of compressor significantly to shorten further, the working service out of control of cost of compressor.
For this problem, also someone attempts improving the filtering material that filter cylinder or cloth bag use.Wherein, common way improves the filter precision of filtering material.To those skilled in the art, in order to improve the filter precision of filtering material, be all feasible way at the higher film of surface attachment one deck filter precision of filtering material or filtering material that directly choosing folding filter precision is higher.But these ways effectively can not improve scale problems.
Summary of the invention
The present invention aims to provide a kind of turbine gas compressor that can effectively improve and uses turbine gas compressor front end deduster and filter element thereof that scale problems occurs for a long time.
Inventor finds, causes the main cause of turbine gas compressor fouling both relevant with the filter precision of front end deduster, simultaneously relevant with the anti-deformation of filtering material in filter element again.The filtering material used due to filter cylinder and cloth bag all has larger flexibility, simultaneously, filter cylinder and cloth bag cannot provide enough Area of bearing to its filtering material again, therefore, when filter element is under filtration and the working state that frequently switches of blowback, filtering material will along with air-flow break-in repeated deformation, finally cause fiber fatigue in filtering material damaged, filter precision declines.Now, also reach far away the working life of its theory the service time of filter cylinder/cloth bag, and it is in appearance also without significant change, although cause the strainability of filter cylinder/cloth bag to decline to be discovered by user, just result in a large amount of dust under continuing use and enter turbine gas compressor and then cause scale problems.
In view of this, turbine gas compressor front end of the present invention deduster have employed following technological scheme: turbine gas compressor front end deduster comprises shell, is arranged on the filter element in shell and acts on the back-blowing dust removing device of filter element, described shell and filter element are connected by orifice plate and form first space and second space of separating, the transmission of gas to be filtered occurs in the first space, and the transmission of filtering gas occurs in second space; Filter element has the filtering material be made up of high density porous polyethylene support and the expanded PTFE filtration membrane that is adhering closely to high density porous polyethylene supporting body surface; Described expanded PTFE filtration membrane treats the eliminating rate of the dust of particle diameter >=0.5 in filtering gas μm more than 99%.
The present invention is based on filtering material repeated deformation causes fiber fatigue breakage to be the understanding of turbine gas compressor fouling root, therefore adopts the filtering material be made up of high density porous polyethylene support and the expanded PTFE filtration membrane that is adhering closely to high density porous polyethylene supporting body surface.Wherein, expanded PTFE filtration membrane itself has very high filter precision (treating the eliminating rate of the dust of particle diameter >=0.5 in filtering gas μm more than 99%), simultaneously, expanded PTFE filtration membrane embodies stronger rigidity again under the support of high density porous polyethylene support, therefore can not filtration and blowback frequently switch in because of air-flow break-in repeated deformation, therefore, filtering material of the present invention can the high filtering precision of stable for extended periods of time, thus effectively improve turbine gas compressor use for a long time under scale formation.
It is pointed out that the expanded PTFE filtration membrane of indication in the present invention, is a kind of on polytetrafluoroethylmaterial material, form the film of fibrous blind hole by tensile buckling (i.e. the implication of " varicosity ").This film itself also has the feature of extremely strong hydrophobicity and not sticky ash, therefore, all not easily produces condensation in a variety of weather conditions and sticks with paste film phenomenon, and can be realized the purifying regeneration of film by back-blowing dust removing device easily.Also will particularly point out, filtering material of the present invention can adopt first by mould-forming high density porous polyethylene support, and then prepares in the method that its surface heat covers one deck expanded PTFE filtration membrane.As long as air-flow is to the peeling force of expanded PTFE filtration membrane when the adhesion between high density porous polyethylene support and expanded PTFE filtration membrane is greater than reverse gas cleaning, namely reach the requirement to close attachment between high density porous polyethylene support and expanded PTFE filtration membrane in the present invention.
As a kind of concrete structure of filter element in the deduster of the present invention's above-mentioned turbine gas compressor front end, described filter element comprise many one end open and the other end close chimney filter, the opening end of these chimney filters is positioned at second space, and each chimney filter comprises by tube layer in high density porous polyethylene support is formed and is attached to the external tube layer formed on described inner tube outer surface and by expanded PTFE filtration membrane.
As the improvement to said structure, described filter element comprises at least one group can integral installation filter element in shell, often organize filter element and comprise many described chimney filters, each chimney filter in same group of filter element is connected as one by the first termination link and the second termination link; Described first termination link to be arranged on described orifice plate and be provided with respectively with the vent of the opening end conducting of described each chimney filter.Because many chimney filters are connected into one group of filter element by this modified node method, therefore improve the convenience of filter element installation.
As the improvement to said structure, the surface that described first termination link carries out contacting with orifice plate is also provided with the annular sealing strip simultaneously surrounding all vents.This annular sealing strip can realize the sealing between each chimney filter and orifice plate simultaneously, simplifies sealing configuration.
As the improvement to said structure, described second termination link is formed by the sealing plate doubled as described each chimney filter closed end.Thus, the structure of filter element can be simplified, be conducive to the making of filter element.
As the improvement to said structure, the hole density of described expanded PTFE filtration membrane is 5 × 10
8individual/cm
2to 30 × 10
8individual/cm
2.Ideal filtration flux can be obtained during the filtering material of the expanded PTFE filtration membrane with above described holes density as existing turbine gas compressor front end deduster.
As the improvement to said structure, described expanded PTFE filtration membrane treats the eliminating rate of the dust of particle diameter >=0.1 in filtering gas μm more than 99%.Thus, the filter precision of expanded PTFE filtration membrane is further increased.
For the filter element of the present invention above-mentioned turbine gas compressor front end deduster, this filter element has the filtering material be made up of high density porous polyethylene support and the expanded PTFE filtration membrane that is adhering closely to high density porous polyethylene supporting body surface; Described expanded PTFE filtration membrane treats the eliminating rate of the dust of particle diameter >=0.5 in filtering gas μm more than 99%.
As the improvement to said structure, described filter element comprises chimney filter, and described chimney filter comprises by tube layer in high density porous polyethylene support is formed and is attached to the external tube layer formed on described inner tube outer surface and by expanded PTFE filtration membrane.
As the improvement to said structure, described filter element comprises filter element, and described filter element comprises many described chimney filters, and wherein each chimney filter is connected as one by the first termination link and the second termination link; Described first termination link be provided with respectively with the vent of the opening end conducting of described each chimney filter.
Below in conjunction with the drawings and specific embodiments, the present invention is described further.The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Fig. 1 is the structural representation of turbine gas compressor front end of the present invention deduster.
Fig. 2 is the structural representation of filter element in the deduster of turbine gas compressor front end of the present invention.
Fig. 3 be in Fig. 2 A to schematic diagram.
Fig. 4 be in Fig. 2 B to schematic diagram.
Fig. 5 is the partial enlarged drawing at C place in Fig. 3.
The crosssection micrographs of the filtering material that Fig. 6 uses for the specific embodiment of the invention.
Expanded PTFE filtration membrane surface micrograph in the filtering material that Fig. 7 uses for the specific embodiment of the invention.
Embodiment
As shown in Fig. 1 to 5, front end deduster is provided with before turbine gas compressor 8, this front end deduster comprises shell 3, be arranged on the filter element 4 on shell 3 and act on the back-blowing dust removing device 1 of filter element 4, described shell 3 and filter element 4 are connected by orifice plate 2 and form first space and second space of separating, the transmission of gas to be filtered occurs in the first space, the transmission of filtering gas occurs in second space, described filter element 4 has the filtering material be made up of high density porous polyethylene support 401b and the expanded PTFE filtration membrane 401a that is adhering closely to high density porous polyethylene support 401b surface, described expanded PTFE filtration membrane 401a treats the eliminating rate of the dust of particle diameter >=0.5 in filtering gas μm more than 99%.The high density porous polyethylene support 401b used due to filter element 4 in the deduster of front end has higher strength and stiffness, after it adhering to expanded PTFE filtration membrane 401a, expanded PTFE filtration membrane 401a is subject to the surface support of high density porous polyethylene support 401b, and the expanded PTFE filtration membrane 401a making itself soft significantly distortion can not occur under filtration and blowback airflow function.
In the front end deduster shown in Fig. 1, in fact the first above-mentioned space refers in shell 3 chamber be positioned at below orifice plate 2; In fact above-mentioned second space refers in shell 3 chamber be positioned at above orifice plate 2.Obviously, for realizing the transmission of gas, the first space must communicate with gas source to be filtered, and second space must communicate with the suction port of turbine gas compressor 8.Specifically, the front end deduster shown in Fig. 1 is an air dust remover disposed in the outdoor, and this deduster is supported on the ground by support 5, and the bottom of its shell 3 directly opens wide; Because the bottom of its shell 3 is directly opened wide, consider necessary protection, the bottom of this deduster is also provided with purse seine 6.Obviously, for this air dust remover, air to be filtered directly enters the first space from the bottom of its shell 3, after filter element 4 filters, clean air is discharged from second space and is entered the suction port of turbine gas compressor 8 by pipeline 7, and the dust in air to be filtered is then blocked in outside the expanded PTFE filtration membrane 401a of filter element 4.And for back-blowing dust removing device 1, as shown in Figure 1, it mainly comprises pulse backblowing generating means 101 and injection tube 102.Winding-up mouth in injection tube 102 is corresponding with the opening end of each chimney filter 401 respectively.
As shown in Fig. 1 to 5, in order to provide enough large filter area, ensure the filtration flux of front end deduster, filter element 4 in the deduster of front end comprise many one end open and the other end close chimney filter 401, the opening end of these chimney filters 401 is positioned at second space side, and each chimney filter 401 comprises by tube layer in high density porous polyethylene support 401b is formed and is attached to the external tube layer formed on described inner tube outer surface and by expanded PTFE filtration membrane 401a.For such filter element, the quantity of chimney filter 401 is more, and the filter area of deduster is larger.
If the chimney filter of substantial amounts 401 can only be installed separately, the use inconvenience of front end deduster certainly will be caused.For this reason, described filter element 4 comprises at least one group can the filter element of integral installation in shell 3, often organize filter element and comprise many described chimney filters 401, each chimney filter 401 in same group of filter element is connected as one by the first termination link 402 and the second termination link 403; Described first termination link 402 to be arranged on described orifice plate 2 and be provided with respectively with the vent 402a of the opening end conducting of described each chimney filter 401.As shown in Figure 1, the first termination link 402 of filter element is pressed on above orifice plate 2 especially by pressing plate 9.
The first above-mentioned termination link 402 and the second termination link 403 preferably adopt polyvinyl plastics or the other materials close with polyvinyl plastics character, to realize the connection of the second termination link 403 and the first termination link 402 and chimney filter 401 by the mode of heating.In addition, as shown in Fig. 2 to 5, the surface that the first termination link 402 carries out contacting with orifice plate 2 is also provided with the annular sealing strip 402b simultaneously surrounding all vent 402a, realizes the integral sealing of orifice plate 2 with same filter element.In addition, the second termination link 403 is formed by the sealing plate doubled as the closed end of described each chimney filter 401.
The present invention above-mentioned front end deduster produces negative pressure by turbine gas compressor 8 air is flowed.Under normal filtration condition, air to be filtered enters the first space from the bottom of front end outer case of dust remover 3, after filter element 4 filters, clean air is discharged from second space and is entered the suction port of turbine gas compressor 8 by pipeline 7, and the dust in air to be filtered is then blocked in outside the expanded PTFE filtration membrane 401a of filter element 4; Back-blowing dust removing device 1 carries out reverse deashing by pulse backblowing air-flow to expanded PTFE filtration membrane 401a after starting.Because expanded PTFE filtration membrane embodies stronger rigidity under the support of high density porous polyethylene support, can't because filter and blowback frequently switch and with air-flow break-in repeated deformation, thus overcome the shortcoming of flexible filter material.
The filtering material used in the above-mentioned embodiment of the present invention, that the mode that expanded PTFE filtration membrane 401a is covered by heat is adhering closely to (this film mulching method is prior art) on high density porous polyethylene support 401b, because expanded PTFE filtration membrane 401a and high density porous polyethylene support 401b is close polymer, therefore both associativities are very good.As seen in Figure 6, in the filtering material be made up of high density porous polyethylene support 401b and the expanded PTFE filtration membrane 401a that is adhering closely to high density porous polyethylene support 401b surface, the aperture of the expanded PTFE filtration membrane 401a on upper strata is far smaller than the high density porous polyethylene support 401b of lower floor, therefore, high density porous polyethylene support 401b only plays a supportive role, and does not participate in filtering.As seen in Figure 7, expanded PTFE filtration membrane 401a by defining fibrous blind hole after tensile buckling on polytetrafluoroethylmaterial material.Wherein, can control the hole density of expanded PTFE filtration membrane 401a according to the amount of tension of polytetrafluoroethylmaterial material.
Because high density porous polyethylene support 401b does not participate in filtering, therefore, expanded PTFE filtration membrane 401a plays a decisive role to the strainability of front end deduster.The specific embodiment of the present invention requires expanded PTFE filtration membrane 401a to reach to treat the filter precision of eliminating rate more than 99% of the dust of particle diameter >=0.1 in filtering gas μm.Found by actual verification, under the filter precision of the eliminating rate of dust treating particle diameter >=0.1 in filtering gas μm more than 99%, turbine gas compressor does not find scale formation in operation after 1 year.In addition, from the angle of practical application, in order to ensure compared with under the prerequisite of high filtering precision, produce larger filtration flux with less filter pressure, the specific embodiment of the present invention also further hole density by expanded PTFE filtration membrane 401a is being set as 5 × 10
8individual/cm
2to 30 × 10
8individual/cm
2.By the hole density of expanded PTFE filtration membrane 401a is set in above-mentioned scope, the filter efficiency of expanded PTFE filtration membrane 401a can be made to reach more satisfactory degree.
Test finds, when the porosity ratio of high density porous polyethylene support 401b is all 30%, when the hole density of expanded PTFE filtration membrane 401a is 15 × 10
8individual/cm
2, when filtration pressure difference equals 190 handkerchief, filtration flux is 2m
3/ m
2min.When maintenance filtration flux is constant, the hole density of expanded PTFE filtration membrane 401a improved further, filtration pressure difference then can reduce.On the contrary, when maintenance filtration flux is constant, the hole density of expanded PTFE filtration membrane 401a reduced, filtration pressure difference then can raise.When hole, density is reduced to 5 × 10
8individual/cm
2time, about filtration pressure difference is elevated to 500 handkerchiefs, close to turbine gas compressor institute capacity limit, therefore be 5 × 10 by the hole density limitations of expanded PTFE filtration membrane 401a
8individual/cm
2above.According to the preparation process of current expanded PTFE filtration membrane 401a, be 30 × 10 by the hole density limitations of expanded PTFE filtration membrane 401a
8individual/cm
2below.
Table 1 is for maintaining filtration flux at 2m
3/ m
2during min, the hole density of expanded PTFE filtration membrane 401a and the relation (porosity ratio of high density porous polyethylene support 401b is all 30%) of filtration pressure difference.Therefrom can find out, when the hole density of expanded PTFE filtration membrane 401a is from 5 × 10
8individual/cm
2become 10 × 10
8individual/cm
2time, filtration pressure difference obviously reduces; When the hole density of expanded PTFE filtration membrane 401a is from 10 × 10
8individual/cm
2become 25 × 10
8individual/cm
2process in, what filtration pressure difference was comparatively mild is reduced to 160 handkerchiefs from 235 handkerchiefs; When the hole density of expanded PTFE filtration membrane 401a is further from 25 × 10
8individual/cm
2become 30 × 10
8individual/cm
2time, the change of filtration pressure difference is very little.Therefore, preferably the hole density of expanded PTFE filtration membrane 401a is set as 10 × 10
8individual/cm
2to 25 × 10
8individual/cm
2.
Table 1
Above-mentioned test carries out when the porosity ratio of high density porous polyethylene support 401b is all 30%.The porosity ratio of high density porous polyethylene support 401b can be set between 25% to 70%, preferably between 30% to 60%.
Claims (10)
1. turbine gas compressor front end deduster, comprise shell (3), be arranged on the filter element (4) in shell (3) and act on the back-blowing dust removing device (1) of filter element (4), described shell (3) and filter element (4) are connected by orifice plate (2) and form first space and second space of separating, the transmission of gas to be filtered occurs in the first space, the transmission of filtering gas occurs in second space, it is characterized in that: described filter element (4) has by high density porous polyethylene support (401b) and the filtering material that forms of expanded PTFE filtration membrane (401a) being adhering closely to high density porous polyethylene support (401b) surface, described expanded PTFE filtration membrane (401a) treats the eliminating rate of the dust of particle diameter >=0.5 in filtering gas μm more than 99%.
2. turbine gas compressor front end as claimed in claim 1 deduster, it is characterized in that: described filter element (4) comprise many one end open and the other end close chimney filter (401), the opening end of these chimney filters (401) is positioned at second space side, and each chimney filter (401) comprises the interior tube layer that is made up of high density porous polyethylene support (401b) and is attached to the external tube layer formed on described interior tube layer outer surface and by expanded PTFE filtration membrane (401a).
3. turbine gas compressor front end as claimed in claim 2 deduster, it is characterized in that: described filter element (4) comprises at least one group can the filter element of integral installation in shell (3), often organize filter element and comprise many described chimney filters (401), each chimney filter (401) in same group of filter element is connected as one by the first termination link (402) and the second termination link (403); Described first termination link (402) be arranged on described orifice plate (2) go up and be provided with respectively with the vent (402a) of the opening end conducting of described each chimney filter (401).
4. turbine gas compressor front end as claimed in claim 3 deduster, is characterized in that: described first termination link (402) is upper is provided with the surface that orifice plate (2) carries out contacting the annular sealing strip (402b) simultaneously surrounding all vents (402a).
5. turbine gas compressor front end as claimed in claim 3 deduster, is characterized in that: described second termination link (403) is formed by the sealing plate doubled as described each chimney filter (401) closed end.
6. as the turbine gas compressor front end deduster in claim 1 to 5 as described in any one claim, it is characterized in that: the hole density of described expanded PTFE filtration membrane (401a) is 5 × 10
8individual/cm
2to 30 × 10
8individual/cm
2.
7. as the turbine gas compressor front end deduster in claim 1 to 5 as described in any one claim, it is characterized in that: described expanded PTFE filtration membrane (401a) treats the eliminating rate of the dust of particle diameter >=0.1 in filtering gas μm more than 99%.
8. for the filter element of the turbine gas compressor front end deduster in claim 1 to 7 described in any one claim, it is characterized in that: this filter element (4) has by high density porous polyethylene support (401b) and the filtering material that forms of expanded PTFE filtration membrane (401a) being adhering closely to high density porous polyethylene support (401b) surface; Described expanded PTFE filtration membrane (401a) treats the eliminating rate of the dust of particle diameter >=0.5 in filtering gas μm more than 99%.
9. filter element as claimed in claim 8, it is characterized in that: described filter element (4) comprises chimney filter (401), described chimney filter (401) comprises the interior tube layer that is made up of high density porous polyethylene support (401b) and is attached to the external tube layer formed on described interior tube layer outer surface and by expanded PTFE filtration membrane (401a).
10. filter element as claimed in claim 9, it is characterized in that: described filter element (4) comprises filter element, described filter element comprises many described chimney filters (401), and wherein each chimney filter (401) is connected as one by the first termination link (402) and the second termination link (403); Described first termination link (402) be provided with respectively with the vent (402a) of the opening end conducting of described each chimney filter (401).
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|---|---|---|---|
| CN201310024020.8A CN103089714B (en) | 2013-01-23 | 2013-01-23 | Turbine gas compressor front end deduster and filter element thereof |
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| CN201310024020.8A CN103089714B (en) | 2013-01-23 | 2013-01-23 | Turbine gas compressor front end deduster and filter element thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4028144A1 (en) | 2019-09-13 | 2022-07-20 | Donaldson Company, Inc. | Air filter systems, filter bag assemblies, filter bags |
| DE102019127739A1 (en) * | 2019-10-15 | 2021-04-15 | Herding Gmbh Filtertechnik | Filter element, filter element holder for a filter element, a filter device, and a method for manufacturing a filter element |
| CN111672226B (en) * | 2020-02-25 | 2022-09-16 | 成都瑞柯林工程技术有限公司 | Device for preventing dew condensation on surface of filter element and filter system using same |
| CN114855232A (en) * | 2022-04-14 | 2022-08-05 | 南通盛杰拉链有限公司 | Metal zipper gold plating device based on automatic circulation |
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| CN1078166A (en) * | 1992-04-06 | 1993-11-10 | 赫丁除尘设备有限公司 | Filter element with plastic shaped body inherent stability, that permeable porous is arranged |
| CN102100993A (en) * | 2009-12-22 | 2011-06-22 | 通用电气公司 | Filter bag and laminated filter media |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102005043791A1 (en) * | 2005-09-13 | 2007-03-15 | Mann + Hummel Gmbh | Device for cleaning air |
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| CN1078166A (en) * | 1992-04-06 | 1993-11-10 | 赫丁除尘设备有限公司 | Filter element with plastic shaped body inherent stability, that permeable porous is arranged |
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| CN102188856A (en) * | 2010-03-12 | 2011-09-21 | 韩国energy技术研究院 | Deep-layer filtering type air filtering medium |
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