CN116712800A - Separation filter equipment based on gaseous filtration of pipeline - Google Patents
Separation filter equipment based on gaseous filtration of pipeline Download PDFInfo
- Publication number
- CN116712800A CN116712800A CN202310633279.6A CN202310633279A CN116712800A CN 116712800 A CN116712800 A CN 116712800A CN 202310633279 A CN202310633279 A CN 202310633279A CN 116712800 A CN116712800 A CN 116712800A
- Authority
- CN
- China
- Prior art keywords
- gas
- control system
- flow
- central control
- filter element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001914 filtration Methods 0.000 title claims abstract description 58
- 238000000926 separation method Methods 0.000 title claims abstract description 27
- 238000007789 sealing Methods 0.000 claims abstract description 64
- 238000004140 cleaning Methods 0.000 claims abstract description 63
- 238000000605 extraction Methods 0.000 claims abstract description 23
- 239000000428 dust Substances 0.000 claims abstract description 19
- 229920000742 Cotton Polymers 0.000 claims description 48
- 238000005192 partition Methods 0.000 claims description 15
- 230000001276 controlling effect Effects 0.000 claims description 13
- 230000002829 reductive effect Effects 0.000 claims description 12
- 230000000903 blocking effect Effects 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 238000005086 pumping Methods 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 5
- 230000002411 adverse Effects 0.000 claims description 4
- 230000008054 signal transmission Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 230000000740 bleeding effect Effects 0.000 abstract 1
- 238000002955 isolation Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 241000220317 Rosa Species 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000002147 killing effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/30—Particle separators, e.g. dust precipitators, using loose filtering material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
- B01D46/444—Auxiliary equipment or operation thereof controlling filtration by flow measuring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
Abstract
The invention discloses a separation filter device based on pipeline gas filtration, which belongs to the technical field of filter devices, and comprises the following main equipment: base, filter core, gas flow monitor, lower sealing plate, center pole, division board group, independent air-purifying room group, aspiration pump, the cover of bleeding, compressed gas device, compressed gas pipe, fan-shaped sealed cowling, rotating electrical machines, flexible motor, sealed mouthful unit, well accuse system, wherein, well accuse system can judge according to the filtration gas flow that gas flow monitor detected the filter core by the degree of dust jam, through the air extraction power of control air extraction unit, guarantee by device filterable gas flow invariable to control rotatory cleaning unit confirms and clear up the serious region of filter core jam, effectively improved filter core device's self-cleaning ability, thereby promoted filtration efficiency.
Description
Technical Field
The invention relates to the technical field of filtering devices, in particular to a separation filtering device based on pipeline gas filtering.
Background
Pipeline filtration is a special term of the filtration industry, and in order to purify original ecological resources and reuse of the resources, a gas filtering device is added into a pipeline to purify gas in the pipeline, and most of the filtering devices known from the market at present are filtering devices which cannot be automatically cleaned, so that the service life is long, the blockage is caused, and the production efficiency is affected.
Chinese patent publication No.: CN217340508U discloses a pipeline gas filter, including casing, electrically controlled valve, ozone generator, rose box and door body, electrically controlled valve fixed connection is in the inner chamber right side wall upside of casing, ozone generator fixed connection is in the left side wall upside of casing, rose box fixed connection is in the inner chamber bottom left side of casing, the door body articulates the preceding lateral wall of casing, the inner chamber left side wall upside fixedly connected with degerming case of casing, this pipeline gas filter, structural design is reasonable, the effectual granule impurity of getting rid of gaseous inside is favorable to protecting the pipeline of conveying gas, has avoided the pipeline damage because of rubbing to scratch leads to, has protected the operational environment during the production and processing, has guaranteed the normal operating of production and processing, has realized killing the microorganism such as gaseous inside, has guaranteed the result of use of producing and processing out the product, has improved the quality when product in-service use.
The device is not provided with the gas flow monitor and the rotary cleaning unit, and the filtered gas flow detected by the gas flow monitor cannot be used for judging the degree of dust blockage in the filter device, and the rotary cleaning unit cannot be controlled to determine and clean the filter device area, so that the self-cleaning capacity of the filter element device is low, and the filtering work efficiency is reduced.
Disclosure of Invention
Therefore, the invention provides a separation filtering device based on pipeline gas filtration, which is used for solving the problems of low self-recovery capacity and low filtering work efficiency in the prior art.
In order to achieve the above object, the present invention provides a separation filter device based on pipe gas filtration, comprising,
an air extracting pump capable of extracting air from the separation filter;
the separation plate group is arranged in the separation filter device, the separation plate group divides the filter element into six independent air purifying chambers, and compressed gas is input into each independent air purifying chamber through the rotary cleaning unit to clean each independent air purifying chamber;
the central control system is used for regulating and controlling the working states of all the components, a gas filtering flow formula is arranged in the central control system, and the central control system can calculate the starting power of the air pump according to the gas filtering flow formula and control the air pump to operate with the starting power;
the central control system can read the filtered gas flow detected by the gas flow monitor, and continuously improve the power of the air pump according to the descending ratio of the filtered gas flow, so as to counteract the adverse effect caused by dust blockage, and enable the filtered gas flow to be continuously restored to the optimal flow after descending;
when the central control system increases the power of the air pump to rated power and the filtered gas flow is reduced to an alarm flow value of the filtered gas, the central control system controls the rotary cleaning unit to clean each independent clean gas chamber;
the central control system controls the rotary cleaning unit to sequentially detect the independent air purifying chambers and controls the rotary cleaning unit to clean the independent air purifying chambers with serious dust blockage;
and the central control system reads the filtered gas flow detected by the gas flow monitor after cleaning is finished, judges whether cleaning work reaches the expectation according to the detection result, and records the times of not reaching the expectation of cleaning, thereby judging whether the filter cotton in the filter element needs to be replaced according to the recorded times.
Further, the separation filter device based on the pipeline gas filtration comprises,
the base is used for fixing the device;
the filter element is arranged on the base and is used for filtering gas;
the rotary cleaning unit is arranged on the sealing port unit and is used for cleaning the filter element;
the sealing port unit is arranged at the upper top of the filter element, and six fan-shaped holes are formed in the circular structure of the sealing port unit;
the air extraction unit is arranged on the filter element and is used for extracting air from the filter element;
the gas flow monitor is arranged in the air extraction unit and is used for detecting the filtered gas flow;
the central control system is arranged on the air extraction unit, is connected with the rotary cleaning unit, the air extraction unit and the gas flow monitor through signal transmission lines, and can coordinate and control each device to work.
Further, the filter element comprises,
the lower sealing plate is arranged at the bottom of the filter element and connected with the base, and is used for sealing the filter element and fixing the central rod;
a center rod provided in the filter cartridge and fixed to the lower sealing plate for fixing the partition plate group;
the partition board group comprises six partition boards which are arranged on the central rod and are used for dividing the inner space of the filter element into areas;
the filter comprises a filter core, a central rod, a filter screen, a filter cotton, an independent air purifying chamber set, six partition plates and a fan-shaped cylinder, wherein the space in the filter core is divided into six independent air purifying chambers by the six partition plates of the partition plate set, each independent air purifying chamber is a fan-shaped cylinder, the independent air purifying chamber comprises the filter screen and the filter cotton, the filter screen is arranged outside the central rod, and the filter cotton is arranged outside the filter screen;
the central control system carries out numbering naming on six independent air purifying chambers, namely a first independent air purifying chamber, a second independent air purifying chamber, a third independent air purifying chamber, a fourth independent air purifying chamber, a fifth independent air purifying chamber and a sixth independent air purifying chamber;
the air extraction unit comprises an air extraction unit body,
the air extracting pump is arranged above the filter element and is connected with the air extracting cover;
the air suction cover is arranged on the filter element, and a circular hole is formed above the air suction cover;
the rotary cleaning unit comprises a rotary cleaning unit body, wherein the rotary cleaning unit comprises,
the compressed gas device is arranged above the filter element and connected with the compressed gas pipe, and is used for providing compressed gas for the independent air purifying chamber blocked by dust;
a compressed gas pipe arranged below the compressed gas device and penetrating through a circular hole above the suction hood;
the fan-shaped sealing cover is arranged below the compressed gas pipe and used for transmitting compressed gas, the lower bottom cover opening of the fan-shaped sealing cover is fan-shaped, the shape of the cover opening of the fan-shaped sealing cover is the same as that of the fan-shaped hole on the sealing opening unit, and the edge of the cover opening of the fan-shaped sealing cover is provided with a sealing ring which can be attached to the sealing opening unit to seal the upper end of the independent air purifying chamber;
a rotary motor disposed in the compressed gas pipe for controlling an angular position of the sector seal cover;
and the telescopic motor is arranged in the compressed gas pipe and used for controlling the height position of the sector sealing cover.
Further, the central control system can control the differential pressure between the inside and the outside of the filter element by controlling the power of the air pump, and a power conversion coefficient is stored in the central control system and is the conversion coefficient of the power of the air pump and the differential pressure between the inside and the outside of the filter element;
the central control system is internally provided with rated power of an air pump, an optimal flow value of filtered gas in unit time of a filter element, a resistance coefficient of the filtered cotton to the filtered gas in a dust-free blocking state, the density of the filtered gas, the total external surface area of the filtered cotton, a differential pressure flow conversion coefficient and the optimal flow value of the filtered gas in unit time of the filter element;
the central control system calculates the starting power of the air pump according to the resistance coefficient of the filter cotton to the gas, the density of the filter gas, the total external surface area of the filter cotton, the differential pressure flow conversion coefficient and the optimal flow value of the filter gas in unit time of the filter element under the dust-free blocking state.
Further, the central control system controls the gas flow monitor to detect the gas flow value filtered in the unit time of the filter element, and the power of the air pump is increased in an equal ratio according to the descending proportion of the flow value, so that the flow of the filtered gas in the unit time of the filter element can be continuously recovered to be the optimal flow;
and when the central control system increases the pumping power to the rated pumping power, stopping modifying the pumping power, and calculating the ratio of the rated pumping power to the starting pumping power.
Further, a cleaning program is arranged in the central control system;
the central control system stores an alarm flow value of filtered gas in unit time of the filter element;
and the air pump continuously operates at rated power, and when the gas flow value filtered in the unit time of the filter element returned by the gas flow monitor is reduced to the gas alarm flow value filtered in the unit time of the filter element, the central control system starts a cleaning program.
Further, when the central control system starts a cleaning program, the rotating motor and the telescopic motor are controlled to seal the upper ends of the independent air purifying chambers sequentially, the gas flow measured by the gas flow monitor is recorded when the fan-shaped sealing cover seals the upper ends of the independent air purifying chambers, the gas flow after sealing the independent air purifying chambers is subjected to difference with an alarm flow value, and each calculated difference is a contribution value of the flow of each independent air purifying chamber;
the flow contribution value reference value preset in the central control system is used for comparing the flow contribution value of each independent clean air chamber with the flow contribution value reference value,
if the flow contribution value of the independent air purifying chamber is larger than or equal to the flow contribution value reference value, the central control system judges that the independent air purifying chamber does not need to be cleaned;
and if the flow contribution value of the independent air purifying chamber is smaller than the flow contribution value reference value, the central control system judges that the independent air purifying chamber needs to be cleaned.
Further, the central control system enables the fan-shaped sealing cover to position an independent air purifying chamber to be cleaned by controlling the rotating motor, and enables the fan-shaped sealing cover to seal the positioned independent air purifying chamber by controlling the telescopic motor, and the central control system controls the compressed air device to input compressed air to the sealed independent air purifying chamber;
after all independent air purifying chambers to be cleaned are cleaned, the central control system controls the air flow monitor to detect the air flow, and records the detection result as the cleaned air flow;
the central control system is internally preset with a filter element depreciation coefficient, the ratio of the filter element depreciation coefficient to the power increase of the air pump is used as an influence factor on the optimal flow of filtered gas, the expected flow value which is required to be achieved by the cleaned filter element when the air pump operates at rated power is calculated, the expected flow value is compared with the cleaned gas flow, whether cleaning is achieved or not is judged, and the number of times which is not achieved is recorded.
Further, after cleaning, the central control system takes the depreciation coefficient of the filter element as an influence factor of the air pump, divides the starting power of the air pump and the depreciation coefficient of the filter element, calculates the power after cleaning, and adjusts the power of the air pump to the power after cleaning;
the central control system controls the gas flow monitor to detect the filtered gas flow, and the power of the air pump is increased in an equal ratio according to the descending proportion of the flow value.
Further, when the central control system judges that the cleaning is not carried out for the expected times for more than three times, the central control system judges that the filter cotton in the device needs to be replaced, and in the three times of cleaning which is not carried out for the expected times, the independent air purifying chamber with the lowest flow contribution value is used as the independent air purifying chamber for replacing the filter cotton, and the independent air purifying chamber information for replacing the filter cotton is sent to a filter element device manager.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the working state of the filter element is monitored by arranging the central control system, the gas flow monitor and the rotary cleaning unit, the central control system judges the degree of the filter element blocked by dust according to the filtered gas flow detected by the gas flow monitor, the constant gas flow filtered by the device is ensured by controlling the air extraction power of the air extraction unit, and the rotary cleaning unit is controlled to determine and clean the area with serious filter element blocking;
through setting up the division board group in the filter core to construct each independent air-purifying chamber in the filter core, make rotatory clearance unit can carry out the isolation type to the regional clearance in the filter core, do not influence other regional normal filtration work, very big improvement the sustainable working capacity of filter core device;
the sealing ring is arranged at the edge of the lower bottom cover opening of the fan-shaped sealing cover, so that the fan-shaped sealing cover and the sealing opening unit can achieve a sealing effect;
the central control system calculates the starting power of the air pump according to the optimal flow value of the filtered gas in the unit time of the filter element, the resistance coefficient of the filter cotton to the gas in the non-dust blocking state in the independent air purifying chamber and the total outer surface area of the filter cotton, so that the starting power of the air pump can meet the requirement of the filter element device in the initial state;
when the resistance coefficient of the filter cotton to the gas is improved, the central control system increases the power of the air pump to improve the pressure difference between the inside and the outside of the filter element, so that the adverse effect caused by the increase of the resistance coefficient of the filter cotton to the gas due to dust blockage is counteracted, and the decrease of the flow of the filter gas is avoided;
the central control system judges the dust blocking condition in each independent air purifying chamber by calculating the flow contribution value of the independent air purifying chamber, so that the independent air purifying chamber needing to be cleaned is judged, and the degree of automation of the filter element device is improved;
the central control system records that the expected cleaning is not achieved, after the cleaning is carried out for many times, the resistance coefficient of the filter cotton to the filtered gas still cannot be reduced, and the filter cotton needs to be replaced under the condition, so that the filtering efficiency of the filter element device can be recovered to be normal.
Drawings
FIG. 1 is a schematic view of a separation filter device based on pipeline gas filtration in an embodiment of the invention;
FIG. 2 is a schematic structural view of a filter element according to an embodiment;
fig. 3 is a schematic structural view of a seal port unit in the embodiment.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1, fig. 2, and fig. 3, fig. 1 is a schematic structural diagram of a separation filtering device based on pipeline gas filtering in an embodiment of the present invention; FIG. 2 is a schematic structural view of a filter element according to an embodiment; FIG. 3 is a schematic view of the structure of a seal port unit in the embodiment;
the invention provides a separation filtering device based on pipeline gas filtration, which comprises,
a base 1 for fixing the device;
a filter element 2 provided on the base 1 for filtering gas;
a rotary cleaning unit 3, which is arranged on the sealing port unit 4 and is used for cleaning the filter element 2;
the sealing port unit 4 is arranged at the upper top of the filter element 2, and six fan-shaped holes are formed in the circular structure of the sealing port unit 4;
the air extracting unit 5 is arranged on the filter element 2 and is used for extracting air from the filter element 2;
a gas flow monitor 6 disposed in the air extraction unit 5 for detecting the flow rate of the filtered gas;
the central control system 7 is arranged on the air extraction unit 5 and is connected with the rotary cleaning unit 3, the air extraction unit 5 and the gas flow monitor 6 through signal transmission lines, the central control system 7 can judge the degree of the filter element 2 blocked by dust according to the filtered gas flow detected by the gas flow monitor 6, the air extraction power of the air extraction unit 5 is controlled to ensure that the gas flow filtered by the device is constant, and the rotary cleaning unit 3 is controlled to determine and clean the area with serious filter element 2 blocking.
In particular, the cartridge 2, comprising,
a lower sealing plate 21, which is disposed at the bottom of the filter element 2 and is connected to the base 1, for sealing the filter element 2 and fixing a central rod 22;
a central rod 22 provided in the filter cartridge 2 and fixed to the lower sealing plate 21 for fixing a partition plate group;
a partition plate group 23 including six partition plates provided on the center rod 22 for dividing the inner space of the filter element 2 into regions;
the six isolation plates of the isolation plate set 23 divide the space in the filter element 2 into six independent air purifying chambers, each independent air purifying chamber is a fan-shaped cylinder, each independent air purifying chamber comprises a filter screen 25 and filter cotton 26, the filter screen 25 is arranged outside the central rod 22, and the filter cotton 26 is arranged outside the filter screen 25;
in the same filter element 2, if the internal space is not divided, the compressed gas device cannot independently input compressed gas into one area, and only when the filter cotton 26 is cleaned, the filter element device can be stopped to work, so that the filtering efficiency is reduced, and through arranging the isolation plate group 23 in the filter element 2, each independent air purifying chamber is built in the filter element 2, the rotary cleaning unit 3 can clean part of the area in the filter element 2 in an isolated manner, the normal filtering work of other areas is not influenced, and the sustainable working capacity of the filter element device is greatly improved;
the central control system 7 carries out numbering naming on six independent air purifying chambers, namely a first independent air purifying chamber, a second independent air purifying chamber, a third independent air purifying chamber, a fourth independent air purifying chamber, a fifth independent air purifying chamber and a sixth independent air purifying chamber.
In particular, the suction unit 5 comprises,
a suction pump 51 disposed above the filter element 2 and connected to a suction hood 52;
the air extraction cover 52 is arranged on the filter element 2, and a circular hole is arranged above the air extraction cover 52;
the rotary cleaning unit 3, comprising,
a compressed gas device 31 disposed above the filter element 2 and connected to a compressed gas pipe 32, the compressed gas device 31 being configured to supply compressed gas to the independent air purifying chamber blocked by dust;
a compressed gas pipe 32 which is provided below the compressed gas device 31 and passes through a circular hole above the suction cap 52;
a fan-shaped sealing cover 33, which is arranged below the compressed gas pipe 32 and is used for transmitting compressed gas, wherein the lower bottom cover opening is fan-shaped, the shape of the cover opening is the same as the fan-shaped shape of the upper surface of the independent air purifying chamber, the shape of the cover opening is the same as the shape of the fan-shaped hole on the sealing opening unit 4, and the cover opening edge of the fan-shaped sealing cover 33 is provided with a sealing ring 34 which can be attached to the sealing opening unit 4 so as to seal the upper end of the independent air purifying chamber;
if the sealing ring 34 is not arranged at the lower bottom cover opening of the fan-shaped sealing cover 33, the compressed gas device 31 can cause a gas leakage phenomenon when carrying out gas transmission on an independent gas purifying chamber needing cleaning, so that the pressure difference between the inside and the outside of the filter element is changed, the filtering efficiency is reduced, and the sealing ring 34 is arranged at the edge of the lower bottom cover opening of the fan-shaped sealing cover 33, so that the fan-shaped sealing cover 33 and the sealing opening unit 4 can achieve the sealing effect.
A rotary motor 35 provided in the compressed gas pipe 32 for controlling an angular position of the sector seal cover 33;
a telescopic motor 36 provided in the compressed gas pipe 32 for controlling the height position of the sector-shaped sealing cover 33.
Further, a gas filtering flow formula is set in the central control system 7: Δp=ε× (Q/s) ×a×ρ;
wherein Δp is the pressure difference between the inside and the outside of the filter element generated by the air suction of the air pump 51, Δp=c×w, W is the air pump power, c is the power conversion coefficient, and the rated power We of the air pump is stored in the central control system 7;
q is the value of the gas flow rate filtered in the unit time of the filter element, which can be detected by the gas flow rate monitor 6;
epsilon is the resistance coefficient of the filter cotton in the independent air purifying chamber to the filtered air;
a is the differential pressure flow conversion coefficient stored in the central control system 7;
ρ is the density of the filtered gas stored in the central control system 7;
s is the total external surface area of the filter cotton stored in the central control system 7;
the central control system 7 controls the air pump 51 to start, the starting power is W1, and w1= (epsilon 0×qe×a×ρ)/(s×c), wherein Qe is the optimal flow value of the filtered gas in unit time of the filter element stored in the central control system 7, and epsilon 0 is the resistance coefficient of the filtered cotton to the gas in the non-dust blocking state in the independent air purifying chamber stored in the central control system 7;
the central control system 7 calculates the starting power of the air pump 51 according to the optimal flow value of the filtered gas in the unit time of the filter element, the resistance coefficient of the filter cotton to the gas in the dust-free blocking state in the independent air purifying chamber and the total outer surface area of the filter cotton, so that the starting power of the air pump 51 can meet the requirement of the filter element device in the initial state.
Further, the device starts to work, dust in the air is accumulated on the filter cotton 26, so that the resistance coefficient of the filter cotton is increased, and the flow value of the filtered gas in unit time of the filter element is continuously reduced;
the central control system 7 controls the gas flow monitor 6 to detect the flow value of the filtered gas in the unit time of the filter element, and increases the power of the air pump 51 in an equal ratio according to the decreasing proportion of the flow value, so that the flow of the filtered gas in the unit time of the filter element can be continuously restored to the optimal flow Qe;
after the filter element device starts to work, dust on the filter cotton 26 is continuously accumulated to cause the blockage of the filter cotton 26, so that the resistance coefficient of the filter cotton to gas is improved, the pressure difference between the inside and the outside of the filter element is kept unchanged under the condition that the power of the air pump is unchanged, so that the filtered gas flow is reduced, when the resistance coefficient of the filter cotton to gas is improved, the central control system 7 increases the power of the air pump 51 through increasing the power of the air pump, so that the pressure difference between the inside and the outside of the filter element is improved, thereby counteracting the adverse effect caused by the increase of the resistance coefficient of the filter cotton to gas due to the blockage of the dust, and avoiding the reduction of the filtered gas flow.
When the central control system 7 increases the pump power to We, the pump power is stopped from being modified, and the power increase ratio b is calculated, where b=we/W1.
Further, a cleaning program is arranged in the central control system 7, and the cleaning program is divided into a detection stage and a compressed gas input stage;
the central control system 7 stores therein an alarm flow value Qj of the filtered gas per unit time of the filter element, and qj=d×qe, where d=0.7;
the air pump 51 continuously operates with the power of We, and when the air flow value filtered in the unit time of the filter element returned by the air flow monitor 6 is reduced to the air alarm flow value Qj filtered in the unit time of the filter element, the central control system 7 starts the cleaning procedure.
Further, when the central control system 7 starts a cleaning procedure, the rotating motor 35 and the telescopic motor 36 are controlled to seal the upper ends of the independent air purifying chambers in sequence by the fan-shaped sealing cover 33, and the air flow Qgi measured by the air flow monitor 6 when the upper ends of the i-th independent air purifying chambers are sealed by the fan-shaped sealing cover 33 is recorded, i=1, 2,3,4,5,6;
for the i independent purge chamber, the central control system 7 calculates a corresponding i independent purge chamber flow contribution Qxi, and Qxi =qj-Qgi, and compares the i independent purge chamber flow contribution Qxi to Qy,
if Qxi is more than or equal to Qy, the central control system 7 judges that the ith independent air purifying chamber does not need to be cleaned;
if Qxi is less than Qy, the central control system 7 judges that the ith independent clean air chamber needs to be cleaned;
wherein Qy is a flow contribution value reference value preset in the central control system 7.
The central control system 7 judges the dust blocking condition in each independent air purifying chamber by calculating the flow contribution value of the independent air purifying chamber, thereby judging the independent air purifying chamber which needs to be cleaned and improving the automation degree of the filter element device.
Further, the central control system 7 controls the rotating motor 35 to enable the fan-shaped sealing cover 33 to position an independent air purifying chamber to be cleaned, controls the telescopic motor 36 to enable the fan-shaped sealing cover 33 to seal the positioned independent air purifying chamber, and controls the compressed air device 31 to input compressed air to the independent air purifying chamber;
after cleaning is completed, the central control system 7 controls the gas flow monitor 6 to detect the gas flow Qw, and compares Qw with Qe,
if Qw is more than or equal to t multiplied by b multiplied by Qe, the central control system 7 judges that the cleaning reaches the expectation;
if Qw is less than t×b×qe, the central control system 7 determines that the cleaning is not up to the expected value, and records the number of times that the cleaning is not up to the expected value;
wherein t is a preset filter element depreciation coefficient in the central control system 7, and t is more than 0 and less than 1.
Further, after the cleaning is finished, the central control system 7 controls the telescopic motor 36 to reset the sector seal cover 33, and controls the air pump 51 to adjust the power to W1× (1/t);
the central control system 7 controls the gas flow monitor 6 to detect the filtered gas flow, and increases the power of the air pump 51 in equal proportion according to the decreasing proportion of the flow value.
Further, the central control system 7 records that the cleaning is not carried out for the expected times for more than three times, the central control system 7 judges that the filter cotton 26 in the device needs to be replaced, and in the three times of cleaning which is not carried out for the expected times, the independent air purifying chamber with the lowest flow contribution value Qxi is used as the independent air purifying chamber for replacing the filter cotton, and the independent air purifying chamber information for replacing the filter cotton is sent to a filter element device manager.
The separation filtering device based on the pipeline gas filtering can be arranged at each position in the pipeline where the gas filtering is needed, so as to achieve the effect of filtering the gas in the pipeline.
The central control system 7 records that the expected cleaning is not achieved, and after a plurality of cleaning, the resistance coefficient of the filter cotton to the filtered gas still cannot be reduced, and in this case, the filter cotton 26 needs to be replaced, so that the filtering efficiency of the filter element device can be recovered to be normal.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
Claims (10)
1. A separation filter device based on pipeline gas filtration is characterized by comprising,
an air extracting pump capable of extracting air from the separation filter;
the separation plate group is arranged in the separation filter device, the separation plate group divides the filter element into six independent air purifying chambers, and compressed gas is input into each independent air purifying chamber through the rotary cleaning unit to clean each independent air purifying chamber;
the central control system is used for regulating and controlling the working states of all the components, a gas filtering flow formula is arranged in the central control system, and the central control system can calculate the starting power of the air pump according to the gas filtering flow formula and control the air pump to operate with the starting power;
the central control system can read the filtered gas flow detected by the gas flow monitor, and continuously improve the power of the air pump according to the descending ratio of the filtered gas flow, so as to counteract the adverse effect caused by dust blockage, and enable the filtered gas flow to be continuously restored to the optimal flow after descending;
when the central control system increases the power of the air pump to rated power and the filtered gas flow is reduced to an alarm flow value of the filtered gas, the central control system controls the rotary cleaning unit to clean each independent clean gas chamber;
the central control system controls the rotary cleaning unit to sequentially detect the independent air purifying chambers and controls the rotary cleaning unit to clean the independent air purifying chambers with serious dust blockage;
and the central control system reads the filtered gas flow detected by the gas flow monitor after cleaning is finished, judges whether cleaning work reaches the expectation according to the detection result, and records the times of not reaching the expectation of cleaning, thereby judging whether the filter cotton in the filter element needs to be replaced according to the recorded times.
2. The split filter unit for pipe-based gas filtration according to claim 1, further comprising,
the base is used for fixing the device;
the filter element is arranged on the base and is used for filtering gas;
the rotary cleaning unit is arranged on the sealing port unit and is used for cleaning the filter element;
the sealing port unit is arranged at the upper top of the filter element, and six fan-shaped holes are formed in the circular structure of the sealing port unit;
the air extraction unit is arranged on the filter element and is used for extracting air from the filter element;
the gas flow monitor is arranged in the air extraction unit and is used for detecting the filtered gas flow;
the central control system is arranged on the air extraction unit, is connected with the rotary cleaning unit, the air extraction unit and the gas flow monitor through signal transmission lines, and can coordinate and control each device to work.
3. The split filter unit for pipe-based gas filtration according to claim 1, wherein the filter cartridge comprises,
the lower sealing plate is arranged at the bottom of the filter element and connected with the base, and is used for sealing the filter element and fixing the central rod;
a center rod provided in the filter cartridge and fixed to the lower sealing plate for fixing the partition plate group;
the partition board group comprises six partition boards which are arranged on the central rod and are used for dividing the inner space of the filter element into areas;
the filter comprises a filter core, a central rod, a filter screen, a filter cotton, an independent air purifying chamber set, six partition plates and a fan-shaped cylinder, wherein the space in the filter core is divided into six independent air purifying chambers by the six partition plates of the partition plate set, each independent air purifying chamber is a fan-shaped cylinder, the independent air purifying chamber comprises the filter screen and the filter cotton, the filter screen is arranged outside the central rod, and the filter cotton is arranged outside the filter screen;
the central control system carries out numbering naming on six independent air purifying chambers, namely a first independent air purifying chamber, a second independent air purifying chamber, a third independent air purifying chamber, a fourth independent air purifying chamber, a fifth independent air purifying chamber and a sixth independent air purifying chamber;
the air extraction unit comprises an air extraction unit body,
the air extracting pump is arranged above the filter element and is connected with the air extracting cover;
the air suction cover is arranged on the filter element, and a circular hole is formed above the air suction cover;
the rotary cleaning unit comprises a rotary cleaning unit body, wherein the rotary cleaning unit comprises,
the compressed gas device is arranged above the filter element and connected with the compressed gas pipe, and is used for providing compressed gas for the independent air purifying chamber blocked by dust;
a compressed gas pipe arranged below the compressed gas device and penetrating through a circular hole above the suction hood;
the fan-shaped sealing cover is arranged below the compressed gas pipe and used for transmitting compressed gas, the lower bottom cover opening of the fan-shaped sealing cover is fan-shaped, the shape of the cover opening of the fan-shaped sealing cover is the same as that of the fan-shaped hole on the sealing opening unit, and the edge of the cover opening of the fan-shaped sealing cover is provided with a sealing ring which can be attached to the sealing opening unit to seal the upper end of the independent air purifying chamber;
a rotary motor disposed in the compressed gas pipe for controlling an angular position of the sector seal cover;
and the telescopic motor is arranged in the compressed gas pipe and used for controlling the height position of the sector sealing cover.
4. The separation filtering device based on pipeline gas filtering according to claim 3, wherein the central control system can control the pressure difference between the inside and the outside of the filter element by controlling the power of the air pump, and a power conversion coefficient is stored in the central control system and is the conversion coefficient of the power of the air pump and the pressure difference between the inside and the outside of the filter element;
the central control system is internally provided with rated power of an air pump, an optimal flow value of filtered gas in unit time of a filter element, a resistance coefficient of the filtered cotton to the filtered gas in a dust-free blocking state, the density of the filtered gas, the total external surface area of the filtered cotton, a differential pressure flow conversion coefficient and the optimal flow value of the filtered gas in unit time of the filter element;
the central control system calculates the starting power of the air pump according to the resistance coefficient of the filter cotton to the gas, the density of the filter gas, the total external surface area of the filter cotton, the differential pressure flow conversion coefficient and the optimal flow value of the filter gas in unit time of the filter element under the dust-free blocking state.
5. The separation filtering device based on pipeline gas filtering according to claim 4, wherein the central control system controls the gas flow monitor to detect the flow value of the filtered gas in unit time of the filter element, and the power of the air pump is increased in equal proportion according to the descending proportion of the flow value, so that the flow of the filtered gas in unit time of the filter element can be continuously restored to the optimal flow;
and when the central control system increases the pumping power to the rated pumping power, stopping modifying the pumping power, and calculating the ratio of the rated pumping power to the starting pumping power.
6. The separation and filtration device based on pipeline gas filtration according to claim 5, wherein a cleaning program is arranged in the central control system;
the central control system stores an alarm flow value of filtered gas in unit time of the filter element;
and the air pump continuously operates at rated power, and when the gas flow value filtered in the unit time of the filter element returned by the gas flow monitor is reduced to the gas alarm flow value filtered in the unit time of the filter element, the central control system starts a cleaning program.
7. The separation and filtration device based on pipeline gas filtration according to claim 6, wherein when the central control system starts a cleaning program, the rotary motor and the telescopic motor are controlled to seal the upper ends of the independent gas purifying chambers in sequence, the gas flow measured by the gas flow monitor is recorded when the fan-shaped sealing cover seals the upper ends of the independent gas purifying chambers, the gas flow sealed by the independent gas purifying chambers is differenced from an alarm flow value, and each calculated difference is a contribution value of the flow of the independent gas purifying chambers;
the flow contribution value reference value preset in the central control system is used for comparing the flow contribution value of each independent clean air chamber with the flow contribution value reference value,
if the flow contribution value of the independent air purifying chamber is larger than or equal to the flow contribution value reference value, the central control system judges that the independent air purifying chamber does not need to be cleaned;
and if the flow contribution value of the independent air purifying chamber is smaller than the flow contribution value reference value, the central control system judges that the independent air purifying chamber needs to be cleaned.
8. The separation and filtration device based on pipeline gas filtration according to claim 7, wherein the central control system controls the rotating motor to enable the fan-shaped sealing cover to position the independent gas purifying chamber to be cleaned, and controls the telescopic motor to enable the fan-shaped sealing cover to seal the positioned independent gas purifying chamber, and the central control system controls the compressed gas device to input compressed gas to the sealed independent gas purifying chamber;
after all independent air purifying chambers to be cleaned are cleaned, the central control system controls the air flow monitor to detect the air flow, and records the detection result as the cleaned air flow;
the central control system is internally preset with a filter element depreciation coefficient, the ratio of the filter element depreciation coefficient to the power increase of the air pump is used as an influence factor on the optimal flow of filtered gas, the expected flow value which is required to be achieved by the cleaned filter element when the air pump operates at rated power is calculated, the expected flow value is compared with the cleaned gas flow, whether cleaning is achieved or not is judged, and the number of times which is not achieved is recorded.
9. The separation and filtration device based on pipeline gas filtration according to claim 8, wherein after cleaning is finished, the central control system takes a filter element depreciation coefficient as an influence factor of the air pump, divides starting power of the air pump and the filter element depreciation coefficient, calculates cleaned power, and adjusts the air pump power to cleaned power;
the central control system controls the gas flow monitor to detect the filtered gas flow, and the power of the air pump is increased in an equal ratio according to the descending proportion of the flow value.
10. The separation filter device based on pipeline gas filtration according to claim 8, wherein when the central control system judges that the cleaning is not carried out for the expected times more than three times, the central control system judges that the filter cotton in the device needs to be replaced, and the independent air purifying chamber with the lowest flow contribution value is used as the independent air purifying chamber needing to replace the filter cotton in the three times of the cleaning which is not carried out for the expected times, and the independent air purifying chamber information needing to replace the filter cotton is sent to a filter element device manager.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310633279.6A CN116712800A (en) | 2023-05-31 | 2023-05-31 | Separation filter equipment based on gaseous filtration of pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310633279.6A CN116712800A (en) | 2023-05-31 | 2023-05-31 | Separation filter equipment based on gaseous filtration of pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116712800A true CN116712800A (en) | 2023-09-08 |
Family
ID=87872637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310633279.6A Pending CN116712800A (en) | 2023-05-31 | 2023-05-31 | Separation filter equipment based on gaseous filtration of pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116712800A (en) |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19517106A1 (en) * | 1995-05-10 | 1996-11-14 | Doerfert Hans Joachim | Air cleaning and filtering ventilation system for hospital chemotherapy room |
| CN2759563Y (en) * | 2004-12-29 | 2006-02-22 | 浙江德安新技术发展有限公司 | On-line back flush filtering device |
| CN101015754A (en) * | 2007-01-01 | 2007-08-15 | 常熟市华能水处理设备有限责任公司 | Filter |
| CN202460279U (en) * | 2011-12-31 | 2012-10-03 | 成都易态科技有限公司 | Filter element, filter and filtering system for surface water purification |
| CN102921220A (en) * | 2011-08-10 | 2013-02-13 | 王克涛 | Back cleaning filter having filtration units on the outer side of device body |
| CN102961932A (en) * | 2012-11-23 | 2013-03-13 | 裕东（中山）机械工程有限公司 | Separated filter element device |
| CN110799077A (en) * | 2017-06-29 | 2020-02-14 | 喜利得股份公司 | Filter cleaning |
| CN111151060A (en) * | 2020-03-02 | 2020-05-15 | 山东船舶技术研究有限公司 | Marine sewage treatment system and method |
| CN211358017U (en) * | 2019-10-12 | 2020-08-28 | 安徽工业大学 | Micropore membrane dust remover based on rotatory pulse deashing |
| CN216361011U (en) * | 2021-12-23 | 2022-04-22 | 赵常林 | High stability type ventilation equipment |
| CN217613660U (en) * | 2022-05-19 | 2022-10-21 | 浙江天赢新材料科技股份有限公司 | Waste gas filtering device of transfer printing machine |
| CN115558534A (en) * | 2022-09-26 | 2023-01-03 | 合肥万豪能源设备有限责任公司 | Be used for filterable device of coal bed gas buggy |
| CN115575288A (en) * | 2022-10-13 | 2023-01-06 | 青岛市计量技术研究院 | Calibration device and calibration method for mask particulate matter filtering efficiency by aerosol dilution method |
| KR20230018331A (en) * | 2021-07-29 | 2023-02-07 | 김일호 | Air purification apparatus |
| CN115945000A (en) * | 2023-03-13 | 2023-04-11 | 昆山鹿城垃圾发电有限公司 | Flue gas treatment equipment for waste incineration |
-
2023
- 2023-05-31 CN CN202310633279.6A patent/CN116712800A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19517106A1 (en) * | 1995-05-10 | 1996-11-14 | Doerfert Hans Joachim | Air cleaning and filtering ventilation system for hospital chemotherapy room |
| CN2759563Y (en) * | 2004-12-29 | 2006-02-22 | 浙江德安新技术发展有限公司 | On-line back flush filtering device |
| CN101015754A (en) * | 2007-01-01 | 2007-08-15 | 常熟市华能水处理设备有限责任公司 | Filter |
| CN102921220A (en) * | 2011-08-10 | 2013-02-13 | 王克涛 | Back cleaning filter having filtration units on the outer side of device body |
| CN202460279U (en) * | 2011-12-31 | 2012-10-03 | 成都易态科技有限公司 | Filter element, filter and filtering system for surface water purification |
| CN102961932A (en) * | 2012-11-23 | 2013-03-13 | 裕东（中山）机械工程有限公司 | Separated filter element device |
| CN110799077A (en) * | 2017-06-29 | 2020-02-14 | 喜利得股份公司 | Filter cleaning |
| CN211358017U (en) * | 2019-10-12 | 2020-08-28 | 安徽工业大学 | Micropore membrane dust remover based on rotatory pulse deashing |
| CN111151060A (en) * | 2020-03-02 | 2020-05-15 | 山东船舶技术研究有限公司 | Marine sewage treatment system and method |
| KR20230018331A (en) * | 2021-07-29 | 2023-02-07 | 김일호 | Air purification apparatus |
| CN216361011U (en) * | 2021-12-23 | 2022-04-22 | 赵常林 | High stability type ventilation equipment |
| CN217613660U (en) * | 2022-05-19 | 2022-10-21 | 浙江天赢新材料科技股份有限公司 | Waste gas filtering device of transfer printing machine |
| CN115558534A (en) * | 2022-09-26 | 2023-01-03 | 合肥万豪能源设备有限责任公司 | Be used for filterable device of coal bed gas buggy |
| CN115575288A (en) * | 2022-10-13 | 2023-01-06 | 青岛市计量技术研究院 | Calibration device and calibration method for mask particulate matter filtering efficiency by aerosol dilution method |
| CN115945000A (en) * | 2023-03-13 | 2023-04-11 | 昆山鹿城垃圾发电有限公司 | Flue gas treatment equipment for waste incineration |
Non-Patent Citations (1)
| Title |
|---|
| 李鹏等: "《压力容器气体泄漏中的FSWT和SVM联合检测方法》", 《电子器件》, vol. 44, no. 4, 20 August 2021 (2021-08-20), pages 1011 - 1018 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106861305B (en) | Internal filtering negative pressure type dust removing device and dust removing method thereof | |
| CN107008074A (en) | A kind of sack cleaner with on-line detecting system | |
| CN203370406U (en) | Air filter with multiple filter layers | |
| CN106621626A (en) | Water filtering and dust absorbing device for flour mills | |
| CN116712800A (en) | Separation filter equipment based on gaseous filtration of pipeline | |
| CN217132910U (en) | Gas monitoring device for operating room | |
| CN207065729U (en) | A kind of air cleaning unit of the filter screen with double medium filtration circle | |
| CN210206308U (en) | FFU air purification unit | |
| CN219891031U (en) | Dustproof monitor | |
| CN215288494U (en) | Sludge dryer | |
| CN208275175U (en) | A kind of cleaner applied to environmental protection | |
| CN112221266B (en) | Miniature vacuum machine with filtration | |
| CN112664368A (en) | Air filter with sensor detection function | |
| CN219563828U (en) | Energy-saving material sucking machine | |
| CN217381805U (en) | Pressure reducing valve for environmental protection equipment | |
| CN109083846A (en) | A kind of box integrated oxygenerator air presses | |
| CN205815360U (en) | A kind of filter cylinder mounting structure for air purifier | |
| CN102430299B (en) | Offline ash removal online overhauling rotary pulse blowing filter-bag dust catcher | |
| CN105890095B (en) | A kind of fresh air purifier | |
| CN213661262U (en) | Uninterruptible power supply device | |
| CN216241205U (en) | Dual-purpose inflating pump with double filters | |
| CN212974478U (en) | Air filter | |
| CN217662151U (en) | Filtering component and air purification processing apparatus | |
| CN205815359U (en) | A kind of air purifier | |
| CN218421628U (en) | High temperature gas cooled piles dust collector before helium isolating valve that possesses blowback function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |