CN112517665A - Method for repairing disc type filter element of polymer filter - Google Patents
Method for repairing disc type filter element of polymer filter Download PDFInfo
- Publication number
- CN112517665A CN112517665A CN202011381373.XA CN202011381373A CN112517665A CN 112517665 A CN112517665 A CN 112517665A CN 202011381373 A CN202011381373 A CN 202011381373A CN 112517665 A CN112517665 A CN 112517665A
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- China
- Prior art keywords
- disc
- filter
- filter disc
- die
- repairing
- Prior art date
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- 229920000642 polymer Polymers 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 18
- 238000003825 pressing Methods 0.000 claims abstract description 14
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 238000007493 shaping process Methods 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000013507 mapping Methods 0.000 claims abstract description 10
- 238000004140 cleaning Methods 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 6
- 239000002253 acid Substances 0.000 claims abstract description 5
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 5
- 238000004806 packaging method and process Methods 0.000 claims abstract description 5
- 238000004506 ultrasonic cleaning Methods 0.000 claims abstract description 5
- 230000000694 effects Effects 0.000 claims abstract description 4
- 238000005485 electric heating Methods 0.000 claims abstract description 4
- 238000005406 washing Methods 0.000 claims abstract description 4
- 238000011068 loading method Methods 0.000 claims abstract description 3
- 238000003754 machining Methods 0.000 claims abstract description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 abstract description 6
- 239000002184 metal Substances 0.000 abstract description 6
- 238000001914 filtration Methods 0.000 description 6
- 229920000515 polycarbonate Polymers 0.000 description 3
- 239000004417 polycarbonate Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/03—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filtering Materials (AREA)
Abstract
The invention discloses a method for repairing a disc type filter element of a polymer filter, which comprises the steps of accurately mapping the appearance of a new disc, machining and manufacturing five-sleeve upper-lower parting die, wherein an inner cavity can contain one disc, loading the deformed disc into the die, putting the die into a high-frequency electric heating furnace, and slowly heating to 450-500 ℃; taking out, slowly pressing the upper and lower dies by using a hydraulic press, mechanically pressurizing and shaping the internal disk in a hot state, repeatedly heating and shaping for many times, cooling, then carrying out acid washing, neutralization, desalted water cleaning, ultrasonic cleaning, single-chip bubble point test, rechecking of the external dimension, drying and packaging to achieve the repairing effect. The invention realizes the shaping and repairing of the deformed metal sintered felt composite disc filter element in the polymer filter for the first time, avoids the abandonment of the expensive imported filter element, prolongs the service life of the filter element and reduces the production cost.
Description
Technical Field
The invention relates to the field of thermal state shaping repair of a deformed metal sintered felt composite disc filter element in a polymer filter, in particular to a repair method of a disc filter element of the polymer filter.
Background
In the prior polycarbonate production, a polymer filter is used in the last unit, a certain amount of metal sintered felt composite disc type filter elements are arranged in the polymer filter, and the polymer filter is used for filtering molten polycarbonate to remove impurities in the molten polycarbonate, so that the requirement of a finished product is met, the filtering precision is 10-20 micrometers, the filtering pressure is 13-17 MPa, the filtering temperature is 300 ℃, the number of built-in filter elements is about 240 pieces and the height is 2 meters, and in actual use, when the polymer filter is improper to operate, the temperature is low, or the polymer is too dirty, and the filtering pressure drop is too high, the polymer can leak between two discs, so that the discs are deformed and damaged, and only the filter elements can be replaced (cannot be repaired), and the cost.
Disclosure of Invention
The invention aims to solve the technical problem of a repairing method of a disc type filter element of a polymer filter, which realizes the shaping and repairing of a deformed metal sintered felt composite disc filter element in the polymer filter for the first time, avoids the abandonment of an imported filter element with high price, prolongs the service life of the imported filter element, reduces the production cost and overcomes the defects in the prior art.
The invention is realized by the following technical scheme: a method for repairing a disc filter element of a polymer filter comprises the steps of accurately mapping the appearance of a new disc, machining and manufacturing five-sleeve upper-lower parting die, enabling an inner cavity to contain the disc, loading the deformed disc into the die, putting the die into a high-frequency electric heating furnace, and slowly heating to 450-500 ℃;
taking out, slowly pressing the upper and lower dies by using a hydraulic press, mechanically pressurizing and shaping the internal disc in a hot state, repeatedly heating and shaping for many times, cooling, then carrying out acid washing, neutralization, desalted water cleaning, ultrasonic cleaning, single-sheet bubble point test, rechecking of the appearance size, drying and packaging to achieve the repairing effect;
when in use, the device is assembled and then subjected to an integral bubble point test with a water column of 200 mm, and the device is air-dried and put into use after being qualified.
As a preferred technical scheme, the method comprises the following specific steps:
s1, preparation before repair: taking a new SK-600 filter sample for mapping;
s2, according to the data of the filter disc after mapping, using 40mm thick SUS316L steel billet double sheets to make 4-5 sets of dies according to the specific data drawn by measurement;
s3, manufacturing a maintenance operation platform;
s4, repairing the die and the heat treatment manufacturer in a matched manner;
s5, heating the deformed filter disc in a high-temperature furnace to 450 ℃, taking out the filter disc and putting the filter disc into a mold;
s6, slowly pressing down the die together with the die by a 40T hydraulic press for 3-10 minutes until the distance between the dies is 15 mm;
s7, cooling and then taking out the filter disc;
s8, putting the filter disc into the high-temperature furnace again for heating, taking out the filter disc when the temperature reaches 500 ℃, and putting the filter disc into a mold;
s9, slowly pressing down the mould by using a 40T hydraulic machine together with the mould within 3-10 minutes until the mould spacing is 10 mm;
s10, cooling and then taking out the filter disc;
s11, heating the filter disc in a high-temperature furnace to 500 ℃, taking out the filter disc and putting the filter disc into a mold;
s12, slowly pressing the die and the die together by using a 40T hydraulic press for 3 to 10 minutes until the distance between the die is matched;
and S13, cooling and taking out the filter disc.
As a preferred technical scheme, during the test, an air inlet pipe is connected to one end of 200 mm water column to introduce air during the test.
The invention has the beneficial effects that: the invention realizes the shaping and repairing of the deformed metal sintered felt composite disc filter element in the polymer filter for the first time, avoids the abandonment of the expensive imported filter element, prolongs the service life of the filter element and reduces the production cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a diagram of a bubble point testing apparatus for a single disk according to the present invention;
FIG. 2 is a diagram of an overall disk bubble point test apparatus according to the present invention.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
In the description of the present invention, it is to be understood that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "central", "end", "length", "outer end", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
Further, in the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
The use of terms such as "upper," "above," "lower," "below," and the like in describing relative spatial positions herein is for the purpose of facilitating description to describe one element or feature's relationship to another element or feature as illustrated in the figures. The spatially relative positional terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "sleeved," "connected," "penetrating," "plugged," and the like are to be construed broadly, e.g., as a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1, according to the repairing method of the disc-type filter element of the polymer filter, five sets of upper and lower parting molds are machined and manufactured by accurately mapping the appearance of a new disc, a disc can be accommodated in an inner cavity, the deformed disc is placed into the mold and is placed into a high-frequency electric heating furnace, and the temperature is slowly increased to 450-500 ℃;
taking out, slowly pressing the upper and lower dies by using a hydraulic press, mechanically pressurizing and shaping the internal disc in a hot state, repeatedly heating and shaping for many times, cooling, then carrying out acid washing, neutralization, desalted water cleaning, ultrasonic cleaning, single-sheet bubble point test, rechecking of the appearance size, drying and packaging to achieve the repairing effect;
when in use, the device is assembled and then subjected to an integral bubble point test with a water column of 200 mm, and the device is air-dried and put into use after being qualified.
The method comprises the following specific steps:
s1, preparation before repair: taking a new SK-600 filter sample for mapping;
s2, according to the data of the filter disc after mapping, using 40mm thick SUS316L steel billet double sheets to make 4-5 sets of dies according to the specific data drawn by measurement;
s3, manufacturing a maintenance operation platform;
s4, repairing the die and the heat treatment manufacturer in a matched manner;
s5, heating the deformed filter disc in a high-temperature furnace to 450 ℃, taking out the filter disc and putting the filter disc into a mold;
s6, slowly pressing down the die together with the die by a 40T hydraulic press for 3-10 minutes until the distance between the dies is 15 mm;
s7, cooling and then taking out the filter disc;
s8, putting the filter disc into the high-temperature furnace again for heating, taking out the filter disc when the temperature reaches 500 ℃, and putting the filter disc into a mold;
s9, slowly pressing down the mould by using a 40T hydraulic machine together with the mould within 3-10 minutes until the mould spacing is 10 mm;
s10, cooling and then taking out the filter disc;
s11, heating the filter disc in a high-temperature furnace to 500 ℃, taking out the filter disc and putting the filter disc into a mold;
s12, slowly pressing the die and the die together by using a 40T hydraulic press for 3 to 10 minutes until the distance between the die is matched;
and S13, cooling and taking out the filter disc.
During the test, an air inlet pipe is connected to one end of the 200 mm water column to introduce air during the test. The heating and pressing for 3-5 times are carried out to ensure that the internal structure of the filter disc is not damaged and the surface appearance flatness is recovered to more than 98 percent. Detecting the appearance size of the interface of the filter disc by using a level meter, after the appearance is qualified, carrying out high-pressure water cleaning, acid cleaning passivation, alkali cleaning neutralization, ultrasonic cleaning, drying in a drying furnace, carrying out single-chip bubble point detection after cleaning, and packaging the qualified filter disc which accords with the 20-micron filtering precision and then sending the qualified filter disc to a user. When the test piece is used, after 240 disc pieces are assembled on the central pipe and pre-compacted under 50MPa, the overall bubble point test is carried out, and the test piece is put into use after being qualified as shown in figures 1 and 2.
The invention has the beneficial effects that: the invention realizes the shaping and repairing of the deformed metal sintered felt composite disc filter element in the polymer filter for the first time, avoids the abandonment of the expensive imported filter element, prolongs the service life of the filter element and reduces the production cost.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
Claims (3)
1. A method for repairing a disc filter element of a polymer filter is characterized in that: the method comprises the following steps of (1) machining and manufacturing five-sleeve upper and lower parting dies by accurately surveying and mapping the appearance of a new disc, wherein an inner cavity can contain a disc, loading the deformed disc into the die, putting the die into a high-frequency electric heating furnace, and slowly heating to 450-500 ℃;
taking out, slowly pressing the upper and lower dies by using a hydraulic press, mechanically pressurizing and shaping the internal disc in a hot state, repeatedly heating and shaping for many times, cooling, then carrying out acid washing, neutralization, desalted water cleaning, ultrasonic cleaning, single-sheet bubble point test, rechecking of the appearance size, drying and packaging to achieve the repairing effect;
when in use, the device is assembled and then subjected to an integral bubble point test with a water column of 200 mm, and the device is air-dried and put into use after being qualified.
2. A method of repairing a polymeric filter disc cartridge according to claim 1, wherein: the method comprises the following specific steps:
s1, preparation before repair: taking a new SK-600 filter sample for mapping;
s2, according to the data of the filter disc after mapping, using 40mm thick SUS316L steel billet double sheets to make 4-5 sets of dies according to the specific data drawn by measurement;
s3, manufacturing a maintenance operation platform;
s4, repairing the die and the heat treatment manufacturer in a matched manner;
s5, heating the deformed filter disc in a high-temperature furnace to 450 ℃, taking out the filter disc and putting the filter disc into a mold;
s6, slowly pressing down the die together with the die by a 40T hydraulic press for 3-10 minutes until the distance between the dies is 15 mm;
s7, cooling and then taking out the filter disc;
s8, putting the filter disc into the high-temperature furnace again for heating, taking out the filter disc when the temperature reaches 500 ℃, and putting the filter disc into a mold;
s9, slowly pressing down the mould by using a 40T hydraulic machine together with the mould within 3-10 minutes until the mould spacing is 10 mm;
s10, cooling and then taking out the filter disc;
s11, heating the filter disc in a high-temperature furnace to 500 ℃, taking out the filter disc and putting the filter disc into a mold;
s12, slowly pressing the die and the die together by using a 40T hydraulic press for 3 to 10 minutes until the distance between the die is matched;
and S13, cooling and taking out the filter disc.
3. A method of repairing a polymeric filter disc cartridge according to claim 1, wherein: during the test, an air inlet pipe is connected to one end of the 200 mm water column to introduce air during the test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011381373.XA CN112517665B (en) | 2020-11-30 | 2020-11-30 | Method for repairing disc type filter element of polymer filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011381373.XA CN112517665B (en) | 2020-11-30 | 2020-11-30 | Method for repairing disc type filter element of polymer filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112517665A true CN112517665A (en) | 2021-03-19 |
| CN112517665B CN112517665B (en) | 2023-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011381373.XA Active CN112517665B (en) | 2020-11-30 | 2020-11-30 | Method for repairing disc type filter element of polymer filter |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2428272A1 (en) * | 1974-06-12 | 1976-01-02 | Krupp Gmbh | Interchangeable filter plates for cell filters - esp. drum filters, employing natural or synthetic fibre filter cloths |
| JPS54112073A (en) * | 1978-02-22 | 1979-09-01 | Nippon Kentetsu Co Ltd | Strain removal method for filter sheet |
| CN204094919U (en) * | 2014-09-03 | 2015-01-14 | 晋城市富基新材料股份有限公司 | A kind of multifunctional honeycomb ceramic filter mould |
| CN111468882A (en) * | 2019-01-23 | 2020-07-31 | 山东卓远装饰材料有限公司 | Technology for repairing deformation and damage of plate and leveling mirror image of plate surface |
| CN111673974A (en) * | 2020-07-01 | 2020-09-18 | 深圳华盛过滤系统有限公司 | Shaping device for filter element production and production process of filter element |
| CN211993851U (en) * | 2020-03-16 | 2020-11-24 | 景县志强机械有限公司 | Filter plate die of automatic ejection type filter press |
-
2020
- 2020-11-30 CN CN202011381373.XA patent/CN112517665B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2428272A1 (en) * | 1974-06-12 | 1976-01-02 | Krupp Gmbh | Interchangeable filter plates for cell filters - esp. drum filters, employing natural or synthetic fibre filter cloths |
| JPS54112073A (en) * | 1978-02-22 | 1979-09-01 | Nippon Kentetsu Co Ltd | Strain removal method for filter sheet |
| CN204094919U (en) * | 2014-09-03 | 2015-01-14 | 晋城市富基新材料股份有限公司 | A kind of multifunctional honeycomb ceramic filter mould |
| CN111468882A (en) * | 2019-01-23 | 2020-07-31 | 山东卓远装饰材料有限公司 | Technology for repairing deformation and damage of plate and leveling mirror image of plate surface |
| CN211993851U (en) * | 2020-03-16 | 2020-11-24 | 景县志强机械有限公司 | Filter plate die of automatic ejection type filter press |
| CN111673974A (en) * | 2020-07-01 | 2020-09-18 | 深圳华盛过滤系统有限公司 | Shaping device for filter element production and production process of filter element |
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| Publication number | Publication date |
|---|---|
| CN112517665B (en) | 2023-03-14 |
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