NL2025879A - Microporous membrane dust collector for dust removal based on rotary pulse and dust removal method therefor - Google Patents

Microporous membrane dust collector for dust removal based on rotary pulse and dust removal method therefor Download PDF

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Publication number
NL2025879A
NL2025879A NL2025879A NL2025879A NL2025879A NL 2025879 A NL2025879 A NL 2025879A NL 2025879 A NL2025879 A NL 2025879A NL 2025879 A NL2025879 A NL 2025879A NL 2025879 A NL2025879 A NL 2025879A
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Prior art keywords
dust removal
filter
microporous membrane
dust collector
dust
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NL2025879A
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Dutch (nl)
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NL2025879B1 (en
Inventor
Qian Fuping
Lui Zhe
Ye Mengmeng
Wu Haitong
Xia Yongjun
Hu Jia
Cao Bowen
Lu Jinli
Dong Wei
Zhang Yueheng
Xia Xiaohu
Sun Tingyu
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Univ Anhui Technology
Anhui Xinchuang Energy Saving&Environmental Protectionscience&Technology Co Ltd
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Publication of NL2025879B1 publication Critical patent/NL2025879B1/en

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    • 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
    • B01D46/446—Auxiliary equipment or operation thereof controlling filtration by pressure 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
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/44—Auxiliary equipment or operation thereof controlling filtration
    • B01D46/46—Auxiliary equipment or operation thereof controlling filtration automatic
    • 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
    • B01D46/48—Removing dust other than cleaning filters, e.g. by using collecting trays
    • 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
    • B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
    • B01D46/543—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms using membranes
    • 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
    • B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
    • B01D46/71—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with pressurised gas, e.g. pulsed air

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

The present invention discloses a microporous membrane dust collector for dust removal based on a rotary pulse, which includes a rotary pulse dust removal 5 mechanism, an outlet pipe, a filter head plate, filter materials, an inlet pipe and a dust hopper, where the filter head plate is arranged inside the microporous membrane dust collector and divides the interior of the microporous membrane dust collector for dust removal based on a rotary pulse into an air purification chamber and a filter material chamber, the air purification chamber is arranged on the upper portion of the filter 10 material chamber, the filter materials are fixedly arranged on the filter head plate, and the filter materials are arranged in the filter material chamber; there are several filter materials, and the filter materials are annularly and uniformly distributed around the axis of the microporous membrane dust collector for dust removal based on a rotary pulse; and the filter materials adopting the plate-shaped PTFE membrane filter materials 15 is made into a fan-shaped frame body structure, and have an overall circular structure through annular arrangement. In the present invention, the microporous PTFE membrane filter materials adopted as the filter materials have stronger hydrophobicity, making it difficult for high-humidity dust to adhere to the surfaces of the filter materials; and at the same time, the filter materials have an inward folding structure, 20 thus effectively increasing a filtering area. (Fig. 1)

Description

1 AO 20.06.1083 NL
MICROPOROUS MEMBRANE DUST COLLECTOR FOR DUST REMOVAL BASED ON ROTARY PULSE AND DUST REMOVAL METHOD THEREFOR
TECHNICAL FIELD The present invention relates to the technical field of dust removal equipment, and in particular, to a microporous membrane dust collector for dust removal based on a rotary pulse and a dust removal method therefor.
BACKGROUND In the 13th Five-Year Ecological Environmental Protection Plan issued by the State Council in 2016, it is proposed to “focus on upgrading coal-burning power plants to achieve ultra-low emissions, implement comprehensive treatment for key industries such as electricity, steel, building materials, petrochemical and non-ferrous metals, and implement coordinated control of maltiple pollutants such as sulfur dioxide, nitrogen oxides, smoke dust, and heavy metals”. There are a large number of thermal power plants, steel mills, open-pit mines and the like in China. During the production process, a large amount of smoke dust is generated. The smoke dust is discharged into the atmosphere after being purified by dust collectors and other purification equipment and meeting standards. The filter structure of the dust collector and the performance of the dust removal system are closely related to the dust removal effect of the dust collector. Therefore, the design and optimization of the filter structure of the dust collector and the dust removal system is an important step to make the performance of the dust collector meet the national standards.
In the production process, a bag type dust collector is not suitable for removing dust with strong hygroscopicity or adhesion, and the dust removal temperature cannot be lower than the dew point temperature, otherwise it may cause problems such as difficulty in dust removal or bag pasting, and the discharge effect is affected to a certain extent.
For the dust removal system of the dust collector, dust removal methods mainly include a mechanical rapping dust removal method and a pulse-jet dust removal method, where
2 AO 20.06.1083 NL the pulse-jet dust removal means that the pulse valve releases a short pulse to distribute compressed air into a jet pipe, the nozzle on the jet pipe faces above the open end of a filter material, the compressed air expands under the action of the nozzle to form a pulse jet, and at the same time, in the adjacent area around the pulse jet, the jet gas entrains will entrain the surrounding air and be injected into the filter material together with the pulse jet to clean the filter material. However, it may be difficult to remove high-humidity dust adhering to the surface of the filter material using the mechanical rapping dust removal method and the pulse-jet dust removal method adopted by the existing dust collectors, thus easily causing the problem of poor dust removal. In view of the foregoing shortcomings, the creator of the present invention has finally obtained the present invention after a long period of research and practice.
SUMMARY In order to solve the foregoing technical problems, the technical solution adopted by the present invention is to provide a microporous membrane dust collector for dust removal based on a rotary pulse, which includes a rotary pulse dust removal mechanism, an outlet pipe, a filter head plate, filter materials, an inlet pipe and a dust hopper, where the filter head plate is arranged inside the microporous membrane dust collector and divides the interior of the microporous membrane dust collector into an air purification chamber and a filter material chamber, the air purification chamber is arranged on the upper portion of the filter material chamber, the filter materials are fixedly arranged on the filter head plate, and the filter materials are arranged in the filter material chamber; the dust hopper is arranged below the filter material chamber, the inlet pipe is arranged on the filter material chamber, and the outlet pipe is arranged on the air purification chamber; there are several filter materials, and the filter materials are annularly and uniformly distributed around the axis of the microporous membrane dust collector; and the filter materials adopting the plate-shaped PTFE membrane filter materials is made into a fan-shaped frame body structure, and have an overall circular structure through annular arrangement.
3 AO 20.06.1083 NL Preferably, an end of the filter material is set as an open end, the filter head plate is provided with a circulation port corresponding to the open end of the filter material, and the open end of the filter material is hermetically connected to the filter head plate.
Preferably, both side edges of the filter material are provided with an inward folding structure formed by an inner side edge and an outer side edge, and the distance between the inner side edge and the axis of the microporous membrane dust collector is smaller than that between the outer side edge and the axis of the microporous membrane dust collector.
Preferably, on the same filter material, at the joint of the inner side edges and the outer side edges, the gap between the two inner side edges has a smaller size than the gap between the outer side edges, thereby forming an inward folded edge at the joint of the inner side edges and the outer side edges.
Preferably, flow guide plates are arranged below the filter materials corresponding to the inlet pipe, there are several flow guide plates, and the height of the flow guide plate increases with the distance to the inlet pipe increasing.
Preferably, the rotary pulse dust removal mechanism includes an air storage tank, a compressed air inlet pipe, an electromagnetic pulse valve, an upper connecting pipe, a gear box, a rotary driving motor, a transmission gear, a lower connecting pipe, a supporting rod and jet pipes; the rotary pulse dust removal mechanism is arranged along the central axis of the microporous membrane dust collector for dust removal based on a rotary pulse; the lower connecting pipe, the supporting rod and the jet pipes are arranged inside the air purification chamber, and the jet pipes are connected to the lower connecting pipe and reinforced through the supporting rod; the upper connecting pipe, the rotary driving motor, the gear box, the transmission gear, the air storage tank, the electromagnetic pulse valve and the compressed air inlet pipe are arranged outside the air purification chamber, the compressed air inlet pipe is connected above the air storage tank, the electromagnetic pulse valve is connected below the air storage tank, the upper connecting pipe is connected to the electromagnetic pulse valve and the lower
4 AO 20.06.1083 NL connecting pipe, the transmission gear is connected to a gear arranged at the top of the lower connecting pipe, and the rotary driving motor drives the transmission gear through the gear box to rotate, so that the lower connecting pipe rotates.
Preferably, there are three jet pipes in total, and the adjacent jet pipes have an included angle of 120°; the diameter of the jet pipe is gradually reduced in the direction away from the lower connecting pipe, the cross section of the head end of the jet pipe has a diameter of 6 cm, and the cross section of the tail end thereof has a diameter of 3 cm.
Preferably, the jet pipe is provided with nozzles; the nozzle has a conical structure and has a diameter of 1.5 cm; several nozzles are arranged corresponding to each of the position of the inner side edge and the position of the outer side edge of the filter material, and the nozzles on the same jet pipe are at equal intervals.
Preferably, a dust removal method for a microporous membrane dust collector for dust removal based on a rotary pulse is provided; inner sides of pipe walls of the inlet pipe and the outlet pipe are respectively provided with parameter measuring devices which measure parameters and feed the parameters back to a PLC control unit, the pressure difference between the inlet pipe and the outlet pipe in the parameters is used for the PLC control unit to control the dust removal mode of the rotary pulse dust removal mechanism, and the PLC control unit 18 used for controlling the working state of the rotary pulse dust removal mechanism.
Preferably, the rotary pulse dust removal mechanism controls four dust removal modes according to the pressure difference: no jetting, low speed, medium speed and high speed; the PLC control unit controls the gear box according to the received pressure difference to adjust the rotating speed of the jet pipe, thereby adjusting the jetting interval; when the detected pressure difference is less than 800 Pa, the rotary pulse dust removal mechanism does not work and is in the no-jetting mode; when the detected pressure difference is 801-1500 Pa, the low-speed dust removal mode is adopted, and dust removal is performed at an interval of 5 min at a jetting pressure of 0.2 MPa for a pulse duration of 200 ms; when the detected pressure difference is 1501-1800 Pa, the
AO 20.06.1083 NL medium-speed dust removal mode is adopted, and dust removal is performed at an interval of 30 s at a jetting pressure of 0.2 MPa for a pulse duration of 200 ms; and when the detected pressure difference is greater than 1801 Pa, the high-speed dust removal mode is adopted, and dust removal is performed at an interval of 5 s at a jetting 5 pressure of 0.2 MPa for a pulse duration of 200 ms. Compared with the prior art, the present invention has the beneficial effects that:
1. microporous PTFE membrane filter materials adopted as the filter materials have stronger hydrophobicity, making it difficult for high-humidity dust to adhere to the surfaces of the filter materials; and at the same time, the filter materials have an inward folding structure, thus effectively increasing the filtering area.
2. Through a rotary pulse jet dust removal system adopted for dust removal, the problem of poor dust removal effect caused by the difficulty in removing high-humidity dust adhering to the surface of the filter material by mechanical rapping is solved. 3.
The adopted jet mechanism only contains one electromagnetic pulse valve, which solves the problem of a large number of pulse valves in the conventional pulse jet system, reduces the system maintenance difficulty and reduces the initial investment of the system.
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is the structural view of a microporous membrane dust collector for dust removal based on a rotary pulse; FIG. 2 is the structural view of a single filter material; FIG. 3 is the structural arrangement view of the filter materials; FIG. 4 is the structural view of a porous plate; FIG. 5 is the structural view of a rotary pulse dust removal mechanism; and FIG. 6 is the top view of the filter materials. Numerical symbols in the figure:
1. rotary pulse dust removal mechanism, 2. air purification chamber, 3. outlet pipe, 4. parameter measuring device, 5. filter head plate, 6. filter materials, 7. filter material chamber, 8. flow guide plate, 9. inlet pipe, 10. porous plate, 11. dust hopper, 12. air
6 AO 20.06.1083 NL storage tank, 13. compressed air inlet pipe, 14. electromagnetic pulse valve, 15. upper connecting pipe, 16. gear box, 17. rotary driving motor, 18. transmission gear, 19. lower connecting pipe, 20. supporting rod, 21. jet pipe, 22. nozzle.
DESCRIPTION OF EMBODIMENTS The foregoing and other technical features and advantages of the present invention will be described in more detail below with reference to the accompanying drawings. Embodiment 1 FIG. 1 is the structural view of a microporous membrane dust collector for dust removal based on a rotary pulse. The microporous membrane dust collector for dust removal based on a rotary pulse according to the present invention includes a rotary pulse dust removal mechanism 1, an outlet pipe 3, a filter head plate 5, filter materials 6, an inlet pipe 9 and a dust hopper 11; the filter head plate 5 is arranged inside the microporous membrane dust collector for dust removal based on a rotary pulse and divides the interior of the microporous membrane dust collector into an air purification chamber 2 and a filter material chamber 7, the air purification chamber 2 is arranged on the upper portion of the filter material chamber 7, the filter materials 6 are fixedly arranged on the filter head plate 5, and the filter materials 6 are arranged in the filter material chamber 7.
The dust hopper 11 18 arranged below the filter material chamber 7 and is used for collecting smoke dust inside the microporous membrane dust collector; the inlet pipe 9 is arranged on the filter material chamber 7, and the outlet pipe 3 is arranged on the air purification chamber 2. Flue gas to be dedusted enters the filter material chamber 7 through the inlet pipe 9, enters the air purification chamber 2 after being filtered by the filter materials 6, and then is discharged through the outlet pipe 3. As shown in FIGs. 2 and 3, FIG. 2 is the structural view of one single filter material; and FIG. 3 is the structural arrangement view of the filter materials. The filter materials 6 are plate-shaped PTFE membrane filter materials, which have stronger hydrophobicity, making it difficult for high-humidity dust to adhere to the surfaces of the filter materials 6; there are several filter materials 6, and the filter materials 6 are
7 AO 20.06.1083 NL annularly and uniformly distributed around the axis of the microporous membrane dust collector for dust removal based on a rotary pulse.
The filter materials 6 adopting the plate-shaped PTFE membrane filter materials is made into a fan-shaped frame body structure, and have an overall circular structure through annular arrangement.
Besides,
the adjacent filter materials 6 are equidistantly arranged.
An end of the filter material 6 is open, the filter head plate 5 is provided with a circulation port corresponding to the open end of the filter material 6, and the open end of the filter material 6 is hermetically connected to the filter head plate 5, so that flue gas in the filter material chamber 7 needs to be filtered and dedusted by the filter material 6 before entering the air purification chamber 2 from the circulation port.
Generally, two side edges of the filter material 6 are folded inwards to form an inner side edge and an outer side edge, and the inner side edge 1s closer to the axis of the microporous membrane dust collector for dust removal based on a rotary pulse than the outer side edge.
Preferably, on the same filter material 6, at the joint of the inner side edges and the outer side edges, the gap between the two inner side edges has a smaller size than the gap between the outer side edges, so that an inward folded edge is formed at the joint of the inner side edges and the outer side edges. thereby preventing the gap between the adjacent filter materials 6 at the position of the inner side edge from being too small, and effectively increasing the filtering area.
In addition, the filter materials 6 are arranged around a circle center, and intervals of the outer ring of the filter materials 6 are greater than those of the inner ring, thereby effectively utilizing the internal space of the dust collector and increasing the filtering area.
Besides, the filter materials 6 are each set into a fan-shaped structure to facilitate production, maintenance and replacement, and the fan-shaped filter materials 6 are combined into a circular structure to facilitate the arrangement of the rotary pulse dust removal device.
Compared with the existing rotary pulse dust removal bag type dust collector, under the condition of the same number of nozzles and the same length of jet pipes, this structure has a larger filtering area; and the filter material of the microporous membrane dust collector has stronger hydrophobicity compared with that of the conventional bag type dust collector, thus avoiding bag pasting in the operation process.
8 AO 20.06.1083 NL Flow guide plates 8 are arranged below the filter materials 6 corresponding to the inlet pipe 9 to ensure that flue gas entering from the inlet pipe 9 uniformly passes through each of the filter materials 6 under the guide of the flow guide plates 8, so as to improve the dust removal effect of the microporous membrane dust collector.
FIG. 4 is the structural view of a porous plate. The inlet pipe 9 is also internally provided with porous plate 10, which is used for realizing prefiltration of large particle dust and avoiding the influence of the large particle dust on the filter materials. Holes in the porous plate 10 are arranged to be sparse at the upper part and dense at the lower part. There are four flow guide plates 8 in total, the installation height of each of the flow guide plates 8 is different, and the flow guide plate having a larger distance to the inlet pipe 9 is higher. In addition, the arrangement of the porous plate 10 and the flow guide plates 8 prevents dust-containing airflow from directly scouring the filter material 6, thus prolonging the service life of the filter material 6; and the porous plate 10 and the flow guide plates 8 can play a role of uniformly distributing the airflow and improve the filtering efficiency of the dust collector. Embodiment 2 FIG. 5 is the structural view of the rotary pulse dust removal mechanism. The rotary pulse dust removal mechanism 1 includes an air storage tank 12, a compressed air inlet pipe 13, an electromagnetic pulse valve 14, an upper connecting pipe 15, a gear box 16, a rotary driving motor 17, a transmission gear 18, a lower connecting pipe 19, a supporting rod 20 and jet pipes 21. The rotary pulse dust removal mechanism 1 is arranged along the central axis of the microporous membrane dust collector, where the lower connecting pipe 19, the supporting rod 20 and the jet pipes 21 are arranged inside the air purification chamber 2, and the jet pipes 21 are connected to the lower connecting pipe 19 and reinforced through the supporting rod 20; the supporting rod 20 and the jet pipe 21 form an included angle of 60°; the upper connecting pipe 15, the rotary driving motor 17, the
9 AO 20.06.1083 NL gear box 16, the transmission gear 18, the air storage tank 12, the electromagnetic pulse valve 14 and the compressed air inlet pipe 13 are arranged outside the air purification chamber 2, the compressed air inlet pipe 13 is connected above the air storage tank 12, the electromagnetic pulse valve 14 is connected below the air storage tank 12, the upper connecting pipe 15 is connected to the electromagnetic pulse valve 14 and the lower connecting pipe 19, the transmission gear 18 is connected to a gear arranged at the top of the lower connecting pipe 19, and the rotary driving motor 17 drives the transmission gear 18 through the gear box 16 to rotate, so that the lower connecting pipe 19 rotates.
Preferably, the upper connecting pipe 15, the lower connecting pipe 19 and the jet pipe 21 are designed as round tubes, so as to reduce the resistance of the rotary pulse dust removal mechanism 1 and improve the jetting effect. There are three jet pipes 21 in total, and the adjacent jet pipes 21 have an included angle of 120°; the diameter of the jet pipe 21 is gradually reduced, the cross section of the head end of the jet pipe 21 has a diameter of 6 cm, and the cross section of the tail end thereof has a diameter of 3 cm. The jet pipe 21 is provided with nozzles 22; in this embodiment, the nozzle 22 has a conical structure and has a diameter of 1.5 cm; 12 nozzles 22 are arranged on each jet pipe in total corresponding to the filter material 6, and six nozzles 22 are arranged corresponding to each of the position of the inner side edge and the position of the outer side edge of the filter material 6, and the nozzles 22 on the same jet pipe 21 are at equal intervals.
The jet pipe 21 has a structure with a gradually reduced diameter, and the nozzles 22 each have a conical structure. The nozzles 22 are at equal intervals, so that it is ensured that the flow rate of each of the nozzles 22 is uniform, which prevents airflow from being accumulated in a certain area, thereby prolonging the service life of the filter material 6; and at the same time, the dust removal effect on the outer side edge of the filter material 6 is ensured, avoiding a poor dust removal effect caused by an insufficient flow rate.
10 AO 20.06.1083 NL In the present invention, in order to ensure a good dust removal effect, the flow rate Q’ of gas passing through the filter material 6 needs to be equal to the gas flow rate Q of the jet cross section, where the flow rate Q’ of gas passing through the filter material 6 is the gas flow rate required by the microporous membrane filter material during dust removal; the gas flow rate Q of the jet cross section is the flow rate of gas on a jet cross section after being ejected from the nozzle, and the jet cross section is a cross section of the gas jet. The expression of the flow rate Q’ of gas passing through the microporous membrane filter material is: 0 = AT where A is a filtering area; and U js areverse blowing air speed formed by the jet airflow in the filter material. The expression of the gas flow rate Q of the jet cross section is: cs 0=44| —+0.147 |Q, d, where c is the turbulence coefficient, and generally, ¢=0.076; dy is the outlet diameter of the nozzle; s is the distance between the nozzle and the jet cross section; and Qo ig the flow rate of the nozzle.
Preferably, FIG. 6 is the top view of the filter materials. In order to express clearer icon indication, the size difference between the inner side edge and the outer side edge is large. Generally, the single filter material 6 has an approximately fan-shaped cross section, then the intersection point of extending lines of the two inner side edges is set as a first circle center, and the intersection point of extending lines of the two outer side edges is set as a second circle center; connecting lines between the first circle center and two endpoints of the inner arc are first auxiliary lines, connecting lines between the first circle center and two end points of the outer arc are second auxiliary lines, the connecting line between the first circle center and the outer endpoint of the inward
11 AO 20.06.1083 NL folding position is a third auxiliary line, and a connecting line between the second circle center and the outer endpoint of the inward folding position is a fourth auxiliary line. Therefore, the expression of the filtering area A of the single filter material is: zh[(8,1,)+28, 0 (1, +D+6,0(2+1,)] 76, (C+ =17) +6, (+1 —1) )| ÁAz_.2+4jpt__ 180 360 where 6 is the included angle between the two outer side edges; 9, is the included angle between the two inner side edges; 9, is the included angle between the two second auxiliary lines; 63 is the included angle between the inner side edge and the third auxiliary line; h is the height of the filter material; 1 is the length of the second auxiliary line; lg is the length of the first auxiliary line; and | is the length of the fourth auxiliary line, where 0;=9,. The expression of the nozzle flow rate €° is: n 5 Q, = 2 dv, where 1 is the number of nozzles for jetting gas on the filter material simultaneously; 5 is a flow coefficient of the nozzle cross section; dy is the outlet diameter of the nozzle; and vo is the speed at which gas is ejected from the nozzle. Since the expression of the nozzle diameter dy can be obtained as follows through the expression of the gas flow rate Q of the filter material and the gas flow rate Q of the jet cross section: 5 Au S d =d ee
0.086436 0.1617nalv, 0.0294 The expression of the inlet diameter Do of the jet pipe is:
12 AO 20.06.1083 NL 2 D, = J where C is a coefficient, which is generally 50%-60%. Through the foregoing expression, the matching arrangement of the structure and size between the filter material 6 and the rotary pulse dust removal mechanism 1 can be quickly implemented, thus improving the filtering and dust removal capability of the microporous membrane dust collector of the present invention.
Through the rotary pulse dust removal mechanism 1 adopted for dust removal, the problem of poor dust removal effect caused by the difficulty in removing high-humidity dust adhering to the surface of the filter material by mechanical rapping in the prior art is solved. In addition, the adopted rotary pulse dust removal mechanism 1 only contains one electromagnetic pulse valve 14, which solves the problem of a large number of pulse valves in the conventional pulse jet system, reduces the system maintenance difficulty and reduces the initial investment of the system. Embodiment 3 Inner sides of pipe walls of the inlet pipe 9 and the outlet pipe 3 are respectively provided with parameter measuring devices 4. The parameter measuring device 4 can measure parameters such as the flue gas flow rate, humidity, temperature and pressure, and feed the parameters back to a PLC control unit, where the measured pressure difference between the inlet pipe 9 and the outlet pipe 3 is used for the PLC control unit to control the dust removal mode of the rotary pulse dust removal mechanism 1. The PLC control unit is used for controlling the working state of the rotary pulse dust removal mechanism 1. The rotary pulse dust removal mechanism 1 controls four dust removal modes according to the pressure difference: no jetting, low speed, medium speed and high speed. Specifically, the PLC control unit controls the gear box through the received pressure difference to adjust the rotational speed of the jet pipe 21, thereby adjusting the jet interval.
13 AO 20.06.1083 NL When the detected pressure difference is less than 800 Pa, the rotary pulse dust removal mechanism 1 does not work and is in the no-jetting mode; when the detected pressure difference is 801-1500 Pa, the low-speed dust removal mode is adopted, and dust removal is performed at an interval of 5 min at a jetting pressure of 0.2 MPa for a pulse duration of 200 ms; when the detected pressure difference is 1501-1800 Pa, the medium-speed dust removal mode is adopted, and dust removal is performed at an interval of 30 s at a jetting pressure of 0.2 MPa for a pulse duration of 200 ms; and when the detected pressure difference is greater than 1801 Pa, the high-speed dust removal mode is adopted, and dust removal is performed at an interval of 5 s at a jetting pressure of 0.2 MPa for a pulse duration of 200 ms.
The PLC control unit is adopted to control the dust removal modes of the rotary pulse dust removal mechanism 1 according to the pressure difference.
There are four dust removal modes In total, so that dust can be removed according to the load on the filter material, it is ensured that the lowest resistance of the dust collector can be kept in the whole life cycle of the filter material 6, and the service life of the filter material can also be prolonged at the same time.
The dust removal control of the PLC control unit uses time control as backup.
When the parameter measuring device 4 fails and cannot feed back parameters, time control can be used to manually set the dust removal interval to avoid the situation where the system stops working due to the failure.
The time control mode is adopted as the standby dust removal control mode, thus avoiding the situation where the dust removal system stops working due to the failure of the pressure difference control mode, causing the dust collector to stop running and causing some economic losses.
The specific operation process is as follows: Flue gas enters the interior of the dust collector from the inlet pipe 9, is filtered through the filter material 6 and then enters the air purification chamber 2 through the filter head plate 5, and then is discharged out of the dust collector through the outlet pipe 3. While the dust collector is running, the parameter measuring device 4 in the outlet pipe 3 acquires parameters in real time and feeds the parameters back to the PLC.
The PLC sets the dust removal mode of the dust collector according to the pressure difference so as to control the gear box 16 to control the rotational speed of the jet pipe 21. The rotary driving motor 17 drives the
14 AO 20.06.1083 NL transmission gear 18 through the gear box 16 to rotate, finally driving the lower connecting pipe 19 and the connected jet pipe 21 to rotate. When the jet pipe 21 rotates to the central position of the circulation port, the electromagnetic pulse valve 14 is switched on, compressed air in the air storage tank 12 is fed into the jet pipe 21 through the upper connecting pipe 15 and the lower connecting pipe 19, the compressed air is ejected through the nozzle 22, the filter materials 6 rapidly expands outwards, and the dust layer attached on the filter material 6 falls off into the dust hopper 11 to achieve the purpose of dust removal.
The foregoing descriptions are only preferred embodiments of the present invention and are merely illustrative rather than restrictive for the present invention. Those skilled in the art shall understand that many changes, modifications, and even equivalents that can be made within the spirit and scope of the present invention as defined by the claims shall fall within the protection scope of the present invention.

Claims (10)

15 AO 20.06.1083 NL Conclusies15 AO 20.06.1083 EN Conclusions 1. Een microporeuze membraan stofverzamelaar voor stofverwijdering op basis van een rotatiepuls, welke een rotatiepuls stofverwijderingsmechanisme, een uitlaatpijp, een filterkopplaat, filtermaterialen, een inlaatpijp en een stofbak omvat, waarbij de filterkopplaat is aangebracht in de microporeuze membraan stofverzamelaar en het binnenste gedeelte van de microporeuze membraan stofverzamelaar verdeelt in een luchtzuiveringskamer en een kamer voor filtermateriaal, waarbij de lachtzuiveringskamer is aangebracht op het bovenste gedeelte van de kamer voor filtermateriaal, de filtermaterialen vast zijn opgesteld op de filterkopplaat en de filtermaterialen zijn gerangschikt in de filtermateriaalkamer; de stofcontainer onder de filtermateriaalkamer is aangebracht, de inlaatpijp op de filtermateriaalkamer is aangebracht en de uitlaatpijp op de luchtzuiveringskamer is aangebracht; waarbij er verschillende filtermaterialen zijn en de filtermaterialen ringvormig zijn en uniform verdeeld rond de as van de microporeuze membraan stofverzamelaar; en waarbij de filtermaterialen die de plaatvormige PTFE-membraanfiltermaterialen aannemen worden gemaakt tot een waaiervormige framelichaam structuur en een algehele cirkelvormige structaur door een ringvormige opstelling hebben.1. A microporous membrane dust collector for dust removal based on a rotary pulse, which comprises a rotary pulse dust removal mechanism, an outlet pipe, a filter head plate, filter materials, an inlet pipe and a dust container, the filter head plate being arranged in the microporous membrane dust collector and the inner part of the dust collector. microporous membrane dust collector divides into an air purification chamber and a filter material chamber, wherein the laughter purification chamber is arranged on the upper part of the filter material chamber, the filter materials are fixedly arranged on the filter head plate, and the filter materials are arranged in the filter material chamber; the dust container is arranged under the filter material chamber, the inlet pipe is arranged on the filter material chamber, and the outlet pipe is arranged on the air purification chamber; wherein there are different filter materials and the filter materials are annular and uniformly distributed around the axis of the microporous membrane dust collector; and wherein the filter materials adopting the plate-shaped PTFE membrane filter materials are made into a fan-shaped frame body structure and have an overall circular structure by an annular arrangement. 2. Microporeuze membraan stofverzamelaar voor stofverwijdering op basis van een rotatiepuls volgens conclusie 1, waarbij een uiteinde van het filtermateriaal is ingesteld als een open uiteinde, de filterkopplaat is voorzien van een circulatiepoort overeenkomend met het open uiteinde van het filtermateriaal en het open uiteinde van het filtermateriaal hermetisch is verbonden met de filterkopplaat.The microporous membrane dust collector for rotary pulse dust removal according to claim 1, wherein one end of the filter material is set as an open end, the filter head plate is provided with a circulation port corresponding to the open end of the filter material and the open end of the filter material. filter material is hermetically connected to the filter head plate. 3. Microporeuze membraan stofverzamelaar voor stofverwijdering op basis van een rotatiepuls volgens conclusie 2, waarbij beide zijranden van het filtermateriaal zijn voorzien van een naar binnen gevouwen structuur gevormd door een binnenzijde en een buitenzijde, en de afstand tussen de binnenste zijrand en de as van de microporeuze membraan stofverzamelaar kleiner is dan die tussen de buitenste zijrand en de as van de microporeuze membraan stofverzamelaar.The microporous membrane dust collector for rotary pulse dust removal according to claim 2, wherein both side edges of the filter material have an inwardly folded structure formed by an inner side and an outer side, and the distance between the inner side edge and the axis of the filter material. microporous membrane dust collector is smaller than that between the outer side edge and the axis of the microporous membrane dust collector. 16 AO 20.06.1083 NL16 AO 20.06.1083 NL 4. Microporeuze membraan stofverzamelaar voor stofverwijdering op basis van een rotatiepuls volgens conclusie 3, waarbij op hetzelfde filtermateriaal bij de verbinding van de binnenzijranden en de buitenzijranden, de spleet tussen de twee binnenranden kleiner is dan de opening tussen de buitenste zijranden, waardoor een naar binnen gevouwen rand wordt gevormd bij de verbinding van de binnenste zijranden en de buitenste zijranden.The microporous membrane dust collector for rotary pulse dust removal according to claim 3, wherein on the same filter material at the junction of the inner side edges and the outer side edges, the gap between the two inner edges is smaller than the gap between the outer side edges, thereby creating an inward opening. folded edge is formed at the junction of the inner side edges and the outer side edges. 5. Microporeuze membraan stofverzamelaar voor stofverwijdering op basis van een rotatiepuls volgens conclusie 1, waarbij stroomgeleidingsplaten zijn aangebracht onder de filtermaterialen die overeenkomen met de inlaatpijp, waarbij er verschillende stroomgeleidingsplaten zijn en de hoogte van de stroomgeleider plaat toeneemt naarmate de afstand tot de inlaatpijp toeneemt.The microporous membrane dust collector for rotary pulse dust removal according to claim 1, wherein flow guide plates are provided under the filter materials corresponding to the inlet pipe, there are different flow guide plates and the height of the flow guide plate increases as the distance from the inlet pipe increases. 6. Microporeuze membraan stofverzamelaar voor stofverwijdering op basis van een rotatiepuls volgens conclusie I, waarbij het rotatiepuls stofverwijderings- mechanisme een luchtopslagtank, een persluchtinlaatpijp, een elektromagnetische pulsklep, een bovenste verbindingspijp, een versnellingsbak, een roterende aandrijfmotor, een transmissietandwiel, een onderste verbindingspijp, een steunstang en straalpijpen omvat; waarbij het rotatiepuls stofverwijderings-mechanisme is opgesteld langs de centrale as van de microporeuze membraan stofverzamelaar; de onderste verbindingspijp, de steunstang en de straalpijpen zijn aangebracht in de luchtzuiveringskamer, en de straalpijpen zijn verbonden met de onderste verbindingspijp en versterkt door de steunstang; waarbij de bovenste verbindingsleiding, de roterende aandrijfmotor, de versnellingsbak, het transmissie- tandwiel, de luchtopslagtank, de elektromagnetische pulsklep en de perslachtinlaatpijp buiten de luchtzuiveringskamer zijn aangebracht, de perslachtinlaatpijp zich boven de luchtopslagtank bevindt, de elektromagnetische pulsklep is aangesloten onder de lachtopslagtank, de bovenste verbindingspijp is verbonden met de elektromagnetische pulsklep en de onderste verbindingspijp, het transmissietandwiel is verbonden met een tandwiel dat bovenaan de onderste verbindingspijp Is aangebracht en de roterende aandrijfmotor het transmissietandwiel aandrijft door de versnellingsbak te draaien, zodat de onderste verbindingspijp roteert.A microporous membrane dust collector for rotary pulse dust removal according to claim I, wherein the rotary pulse dust removal mechanism is an air storage tank, a compressed air intake pipe, an electromagnetic pulse valve, an upper connecting pipe, a gearbox, a rotary drive motor, a transmission gear, a lower connecting pipe, includes a support rod and nozzles; wherein the rotary pulse dust removal mechanism is disposed along the central axis of the microporous membrane dust collector; the lower connecting pipe, the support rod and the nozzles are arranged in the air purification chamber, and the nozzles are connected to the lower connecting pipe and reinforced by the support rod; wherein the upper connecting pipe, the rotary drive motor, the gearbox, the transmission gear, the air storage tank, the electromagnetic pulse valve and the discharge inlet pipe are arranged outside the air purification chamber, the discharge inlet pipe is located above the air storage tank, the electromagnetic pulse valve is connected below the laugh storage tank, the upper connecting pipe is connected with the electromagnetic pulse valve and the lower connecting pipe, the transmission gear is connected with a gear arranged at the top of the lower connecting pipe, and the rotary drive motor drives the transmission gear by rotating the gearbox, so that the lower connecting pipe rotates. 17 AO 20.06.1083 NL17 AO 20.06.1083 GB 7. Microporeuze membraan stofverzamelaar voor stofverwijdering op basis van een rotatiepuls volgens conclusie 6, waarbij er in totaal drie straalpijpen zijn en de aangrenzende straalpijpen een ingesloten hoek van 120 ° hebben; de diameter van de straalpijp geleidelijk wordt verkleind in de richting weg van de onderste verbindingspijp, de dwarsdoorsnede van het hoofdeinde van de straalpijp een diameter heeft van 6 cm en de dwarsdoorsnede van het staartuiteinde daarvan een diameter van 3 cm heeft.The microporous membrane dust collector for rotary pulse dust removal according to claim 6, wherein there are three nozzles in total and the adjacent nozzles have an included angle of 120 °; the diameter of the nozzle is gradually reduced in the direction away from the lower connecting pipe, the cross section of the head end of the nozzle has a diameter of 6 cm and the cross section of the tail end thereof has a diameter of 3 cm. 8. Microporeuze membraan stofverzamelaar voor stofverwijdering op basis van een rotatiepuls volgens conclusie 6, waarbij de straalpijp is voorzien van mondstukken; het mondstuk een conische structuur en een diameter van 1,5 cm heeft; meerdere mondstukken opgesteld zijn overeenkomstig elk van de positie van de binnenzijrand en de positie van de buitenzijrand van het filtermateriaal, en waarbij de mondstukken op dezelfde straalpijp zich op gelijke intervallen bevinden.The microporous membrane dust collector for rotary pulse dust removal according to claim 6, wherein the nozzle is provided with nozzles; the nozzle has a conical structure and a diameter of 1.5 cm; a plurality of nozzles are arranged according to each of the position of the inner side edge and the position of the outer side edge of the filter material, and the nozzles on the same nozzle being at equal intervals. 9. Werkwijze voor stofverwijdering voor de microporeuze membraan stofverzamelaar voor stofverwijdering op basis van een rotatiepuls volgens één van de conclusies 1 tot 8, waarbij de binnenzijden van buiswanden van de inlaatpijp respectievelijk de uitlaatpijp zijn voorzien van parametermeting apparaten die parameters meten en de parameters terugsturen naar een PLC-regeleenheid, het drakverschil tussen de inlaatpijp en de uitlaatpijp in de parameters wordt gebruikt voor de PLC-regeleenheid om de stofverwijderingsmodus van het rotatiepuls stofverwijderingsmechanisme te regelen, en de PLC-regeleenheid wordt gebruikt voor het regelen van de werking van het rotatiepuls stofverwijderingsmechanisme.A dust removal method for the microporous membrane dust collector for dust removal based on a rotary pulse according to any one of claims 1 to 8, wherein the inner sides of tube walls of the inlet pipe and the outlet pipe respectively are provided with parameter measurement devices that measure parameters and return the parameters to a PLC control unit, the drag difference between the inlet pipe and the outlet pipe in the parameters is used for the PLC control unit to control the dust removal mode of the rotation pulse dust removal mechanism, and the PLC control unit is used to control the operation of the rotation pulse dust removal mechanism . 10. Werkwijze voor stofverwijdering volgens conclusie 9, waarbij het rotatiepuls stofverwijderingsmechanisme vier stofverwijderingsmodi regelt volgens het drukverschil: geen stralen, lage snelheid, gemiddelde snelheid en hoge snelheid; de PLC-regeleenheid de versnellingsbak bestuurt volgens het ontvangen drukverschil om de rotatiesnelheid van de straalpijp aan te passen, waardoor het straalinterval wordt aangepast; wanneer het gedetecteerde drukverschil kleiner is dan 800 Pa, werkt hetThe dust removal method of claim 9, wherein the rotary pulse dust removal mechanism controls four dust removal modes according to the pressure differential: no blasting, low speed, medium speed, and high speed; the PLC control unit controls the gearbox according to the received differential pressure to adjust the nozzle rotation speed, adjusting the jet interval; when the detected differential pressure is less than 800 Pa, it works 18 AO 20.06.1083 NL rotatiepuls stofverwijderingsmechanisme niet en bevindt het zich in de niet- straalmodus; als het gedetecteerde drukverschil 801-1500 Pa is wordt de stofverwijderingsmodus op lage snelheid gebruikt en wordt stofverwijdering uitgevoerd met een interval van 5 minuten bij een straaldruk van 0,2 MPa voor een pulsduur van18 AO 20.06.1083 GB rotation pulse dust removal mechanism is not and is in no-blast mode; if the detected differential pressure is 801-1500 Pa, the dust removal mode is used at low speed and dust removal is performed at an interval of 5 minutes at a blast pressure of 0.2 MPa for a pulse duration of 200 ms; wanneer het gedetecteerde drukverschil 1501-1800 Pa is, wordt de stofverwijderingsmodus op gemiddelde snelheid gebruikt en wordt stofverwijdering uitgevoerd met een interval van 30 s bij een straaldruk van 0,2 MPa voor een pulsduur van 200 ms; en wanneer het gedetecteerde drukverschil groter is dan 1801 Pa, wordt de stofverwijderingsmodas met hoge snelheid aangenomen en wordt stofverwijdering uitgevoerd met een interval van 5 s bij een straaldruk van 0,2 MPa voor een pulsduur van 200 ms.200 ms; when the detected pressure differential is 1501-1800 Pa, the medium speed dust removal mode is used and dust removal is performed at an interval of 30 s at a blast pressure of 0.2 MPa for a pulse duration of 200 ms; and when the detected pressure difference is greater than 1801 Pa, the high speed dust removal modas is assumed and dust removal is performed at an interval of 5 s at a jet pressure of 0.2 MPa for a pulse duration of 200 ms.
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