CN215822682U - Mining double-cyclone efficient wet dust removal fan - Google Patents
Mining double-cyclone efficient wet dust removal fan Download PDFInfo
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- CN215822682U CN215822682U CN202122287668.7U CN202122287668U CN215822682U CN 215822682 U CN215822682 U CN 215822682U CN 202122287668 U CN202122287668 U CN 202122287668U CN 215822682 U CN215822682 U CN 215822682U
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Abstract
The utility model discloses a mining double-cyclone efficient wet dust removal fan which mainly comprises a spraying device, a main air cylinder, a primary filtering device, a motor protective cover, a secondary filtering device and a dust detector, wherein the dust detector is arranged at the front end of the main air cylinder, the spraying device is arranged on the wall of an air inlet cylinder in a penetrating mode, the motor is installed in a cylinder body of the main air cylinder, the motor protective cover is arranged on the periphery of a motor body, the primary filtering device is arranged in the main air cylinder, the secondary filtering device is connected behind the main air cylinder, a sewage box is arranged below the cylinder body of the main air cylinder and the cylinder body of the secondary filtering device, and a sewage discharge outlet is connected to the sewage box. The utility model adopts two-stage cyclone filtration, the first stage cyclone filters most of the dust-containing liquid drops with larger particles, the second stage cyclone filters the ultrafine dust with smaller particle diameter, the adsorption efficiency is high, the dust removal effect is good, and meanwhile, the utility model is also provided with a dust detector, the motor speed can be automatically adjusted according to the dust concentration, and the utility model is energy-saving and environment-friendly.
Description
Technical Field
The utility model relates to the technical field of dust removing equipment, in particular to a mining double-cyclone efficient wet dust removing fan.
Background
In mine or tunnel excavation operation, a large amount of dust is often produced, the diffused dust seriously threatens the health of constructors, and simultaneously pollutes the site and the surrounding environment to influence the normal operation. Wherein, because wet dust collector adopts liquid spraying rethread centrifugal force to realize that gas-water separation comes the purified gas, have simple structure, low in cost etc. advantage and by the wide application of mine enterprise, however present wet dust collector is limited to the adsorption efficiency of dusty liquid drop, dust collection efficiency is not high, can't satisfy established gas-water separation requirement, and to some less dust of particle diameter, its dust removal effect is also not showing, how to promote the dust collection efficiency and the dust removal effect of mining wet dust collector fan be the present problem that awaits the solution urgently. Therefore, in order to solve these technical problems, scientific research units and scientific personnel of enterprises are continuously researching and exploring, and the technical innovation of modern science and technology is improved, but the technical problem which is not overcome in practical application still exists.
Disclosure of Invention
The utility model aims to provide a mining double-cyclone efficient wet dust removal fan which adopts a two-stage cyclone filtering arrangement, wherein a first stage cyclone filters most of dust-containing liquid drops with larger particles, a second stage cyclone filters ultrafine dust with smaller particle diameter, the adsorption efficiency is high, the dust removal effect is good, and meanwhile, the mining double-cyclone efficient wet dust removal fan is also provided with a dust detector, the motor speed can be automatically adjusted according to the dust concentration, and the mining double-cyclone efficient wet dust removal fan is energy-saving and environment-friendly.
The technical scheme adopted by the utility model for solving the technical problems is as follows: a mining double-cyclone efficient wet dust removal fan comprises an air inlet cylinder, a spraying device, an impeller, a main air cylinder, a primary filtering device, a filter cylinder, a mounting plate, a primary cyclone impeller, a filter cylinder body, a water permeable hole, a motor protective cover, a water retaining groove, a secondary filtering device, a secondary cyclone impeller, a diversion trench, a water throwing cylinder, a water throwing hole, a water returning cylinder, an air outlet cylinder, a silencing device, a ventilation pipe, a sewage box, a sewage discharge port and a dust detector, wherein the air inlet cylinder is arranged on one side of the main air cylinder, the front end of the air inlet cylinder is provided with the dust detector, the spraying device penetrates through the wall of the air inlet cylinder, a nozzle of the spraying device is correspondingly arranged at the axis position of the air inlet cylinder, the motor is arranged in the cylinder body of the main air cylinder, the impeller is connected to an output shaft of the motor, the motor protective cover is arranged on the periphery of a motor body, and an air exhaust channel is arranged in the space between the main air cylinder and the motor protective cover, a primary filtering device is arranged in the exhaust channel, the primary filtering device consists of a plurality of groups of filter cartridges and a mounting plate, the mounting plate is an annular plate, the diameter of an inner ring of the mounting plate is the same as the outer diameter of a motor protective cover, the inner ring is sleeved and fixed on the motor protective cover, the diameter of an outer ring is the same as the inner diameter of a main air duct barrel, the outer ring is fixedly connected to the inner wall of the main air duct, the mounting plate is uniformly provided with the plurality of groups of filter cartridges along the periphery of the motor protective cover, the filtering barrel is provided with a plurality of water permeable holes, a primary rotational flow impeller is arranged in the barrel close to the mounting plate, and a section of barrel far away from the mounting plate is conical; the rear of the main air cylinder is connected with a secondary filtering device, a cylinder body of the secondary filtering device and the main air cylinder are arranged in the same diameter, the inner wall of the cylinder body of the secondary filtering device is provided with a plurality of longitudinal wave-shaped diversion grooves, a water throwing cylinder is coaxially arranged in the secondary filtering device, a cavity is reserved between the water throwing cylinder and the cylinder body of the secondary filtering device, one side of the water throwing cylinder is fixedly connected with a motor protective cover, one end of the water throwing cylinder, which is connected with the motor protective cover, protrudes out of the cylinder body of the secondary filtering device to form a water retaining groove at the joint of the water throwing cylinder and the main air cylinder, the water throwing cylinder is provided with a plurality of irregular water throwing holes, one side, which is close to the motor protective cover, in the water throwing cylinder is provided with a secondary rotational flow impeller, an air outlet cylinder is arranged at the air outlet of the cylinder body of the secondary filtering device, and the inner side of the air outlet cylinder is provided with a horn-shaped water returning cylinder; and sewage boxes are arranged below the main air duct and the secondary filtering device barrel, and are connected with sewage outlets.
Preferably, the motor protection cover on be equipped with 2 at least group ventilation pipes, link up and set up between motor protection cover and main dryer and switch on with the external world, the ventilation pipe sets up in motor protection cover rear, arranges the position in between the one-level filter equipment toper section barrel.
Preferably, the outer surfaces of the main air duct and the secondary filtering device barrel are coated with silencing devices, and sound absorbing materials are filled in the silencing devices.
Preferably, the impeller can be made into any one of a centrifugal type, a mixed flow type and an axial flow type.
Preferably, the dust detector is connected with a main controller, and the main controller is connected with the motor.
The technical principle adopted by the utility model for solving the technical problems is as follows: the utility model adopts a two-stage cyclone filtration mode aiming at the problems of low absorption efficiency and poor dust removal effect of the existing mining wet dust collector on dust-containing liquid drops. One-level filter equipment adopts the branch cartridge type to filter, the front end of cartridge filter is equipped with one-level whirl impeller, be equipped with a plurality of holes of permeating water on the stack shell, the toper is established to the barrel back end, the flue gas that one-level whirl impeller will have the dust-laden liquid drop forms the swirl in the cartridge filter, on the dust-laden liquid drop in the flue gas was got rid of the barrel wall of filtering the barrel, utilize the centrifugation principle, the dust-laden liquid drop received centrifugal force outside the cartridge filter was thrown away along the hole of permeating water, be collected by the sewage box who sets up in main dryer below, and discharge by the drain, reach gas-liquid separation and obtain the purpose. When the dust-containing liquid drops pass through the primary filter device along with the flue gas flow, the dust-containing liquid drops are dispersed, adsorbed and filtered by the filter cartridges arranged on the mounting plate, the adsorption efficiency is higher, the filter effect is better, most dust-containing liquid drops can be filtered at one time, and the dust-containing liquid drops which are smaller in particle diameter and not captured can enter the secondary filter device along with the air flow. The less micronic dust liquid drop of particle diameter needs bigger centrifugal force could be caught, before getting into second grade filter equipment, because first grade filter equipment's filter cylinder back end is established into the toper, have the effect of venturi, when the air current passes through this toper section, air velocity can be accelerated, gas that contains the fine dust liquid drop after the acceleration passes through behind second grade whirl impeller again, bigger centrifugal force has been obtained, the superfine micronic dust liquid drop in the flue gas is thrown away outside throwing away the water drum, and in flowing into the sewage box along the guiding gutter, discharge through the drain at last. The dust removal fan is also provided with two water retaining devices, the first position is a water retaining groove which is arranged at the front end of the secondary filtering device and can further help to intercept dust-containing liquid drops discharged from the primary filtering device, so that the dust removal fan plays a role in further adsorption and separation; the second department is for returning the water drum, sets up in the play dryer, can not only further improve the efficiency of aqueous vapor separation, ensures dust removal effect, can also ensure last exhaust gas's degree of drying, guarantees that job site operational environment is normal, avoids the humidity too big healthy production influence to the constructor. The dust detector is arranged, and when the dust contained in the air is little or the dust removal requirement is low, the main controller automatically adjusts the speed of the motor through signal feedback, reduces the load of the motor and plays a role in energy conservation and emission reduction. In order to reduce the harm of noise generated by the dust removal fan in work to the body of site construction personnel, the outer surfaces of the main air duct 4 and the secondary filtering device 9 are coated with a silencing device 10, and the silencing device 10 is filled with sound absorption materials.
Compared with the prior art, the utility model has the beneficial effects that:
the two-stage cyclone filtration device is adopted, the first-stage cyclone filters most of dust-containing liquid drops, and the second-stage cyclone filters ultrafine dust with smaller particle diameter, so that the adsorption efficiency is high and the dust removal effect is good.
1. The primary filtering device adopts the split-drum type filtering, so that the adsorption efficiency is higher, the filtering effect is better, and most of dust-containing liquid drops can be filtered at one time;
2. the front end of the first-stage filter cylinder is provided with a first-stage rotational flow impeller, the cylinder body is provided with a water permeable hole, the rear section of the cylinder body is designed into a cone shape, the rotational flow impeller forms a vortex for dust-containing water vapor in the cylinder body, and dust-containing liquid drops are thrown out of the cylinder body along the water permeable hole under the action of centrifugal force, so that the purpose of gas-liquid separation is achieved; the conical section provides acceleration for secondary filtration so as to obtain larger centrifugal force;
3. the secondary filtering device can filter ultrafine dust with smaller particle diameter by larger centrifugal force, and is provided with the flow guide groove, so that sewage can be guided into the sewage box, secondary carrying of air flow can be avoided, and the dust removal effect is further improved;
4. the water retaining device is provided with two water retaining devices, a water retaining groove and a water returning cylinder, so that the effect of further adsorption and separation is achieved, the efficiency of water-gas separation is improved, the dust removal effect is ensured, the drying degree of finally discharged gas is ensured, and the normal working environment of a construction site is ensured.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of a primary filtration apparatus according to the present invention;
FIG. 3 is a schematic view of the filter cartridge of the present invention;
FIG. 4 is a schematic view of the overall structure of the present invention when a mixed-flow impeller is used;
FIG. 5 is a schematic view of the overall structure of the present invention when an axial flow impeller is used;
in the figure: 1. an air inlet cylinder; 2. a spraying device; 3. an impeller; 4. a main air duct; 5. a primary filtration device; 51. a filter cartridge; 52. mounting a plate; 511. a first stage swirl impeller; 512. a filter cylinder; 513. water permeable holes; 6. a motor; 7. a motor protection cover; 8. a water retaining groove; 9. a secondary filtration device; 91. a second stage swirl impeller; 92. a diversion trench; 93. a water throwing cylinder; 94. a water throwing hole; 95. a water return cylinder; 96. an air outlet cylinder; 10. a silencer device; 11. a vent pipe; 12. a sewage box; 13. a sewage draining outlet; 14 dust detector.
Detailed Description
The utility model is further described below with reference to the following figures and examples:
in fig. 1-3, the present invention provides a technical solution: a mining double-cyclone efficient wet dust removal fan comprises an air inlet cylinder 1, a spraying device 2, an impeller 3, a main air cylinder 4, a primary filtering device 5, a filter cylinder 51, a mounting plate 52, a primary cyclone impeller 511, a filtering cylinder 512, a water permeable hole 513, a motor 6, a motor protective cover 7, a water retaining groove 8, a secondary filtering device 9, a secondary cyclone impeller 91, a diversion trench 92, a water throwing cylinder 93, a water throwing hole 94, a water returning cylinder 95, an air outlet cylinder 96, a silencing device 10, a ventilation pipe 11, a sewage box 12 and a sewage discharge outlet 13, wherein the air inlet cylinder 1 is arranged on one side of the main air cylinder 4, a dust detector 14 is arranged at the front end of the air inlet cylinder 1, and the dust detector 14 can also be arranged in a dust exhaust pipeline and is generally arranged at the front end of a dust remover; the spraying device 2 is arranged on the wall of the air inlet barrel 1 in a penetrating mode, a nozzle of the spraying device 2 is correspondingly arranged at the axis position of the air inlet barrel 1, a motor 6 is installed in a barrel body of a main air barrel 4, an impeller 3 is connected to an output shaft of the motor 6, the impeller 3 can be made into any one of a centrifugal type, a mixed flow type and an axial flow type (as shown in figures 4 and 5), a motor protective cover 7 is arranged on the periphery of a machine body of the motor 6, in order to dissipate heat of the motor 6 and prolong the service life of the motor, 2-4 groups of ventilation pipes 11 are arranged on the motor protective cover 7, and the ventilation pipes 11 are communicated between the motor protective cover 7 and the main air barrel 4 and are communicated with the outside to form gas exchange. The ventilation pipe 11 is arranged behind the motor protective cover 7 and is arranged between the conical cylinders of the primary filtering device 5. The space between main dryer 4 and the motor protection cover 7 is the air exhaust channel, be equipped with one-level filter equipment 5 in the air exhaust channel, one-level filter equipment 5 comprises multiunit cartridge filter 51 and mounting panel 52, mounting panel 52 is the annular slab, its inner ring diameter is the same with motor protection cover 7 external diameter, the inner ring cover is established and is fixed on the motor protection cover, the outer loop diameter is the same with 4 barrel internal diameters of main dryer, outer loop fixed connection is on 4 inner walls of main dryer, evenly install multiunit cartridge filter 51 around motor protection cover 7 on the mounting panel 52, be equipped with a plurality of holes 513 of permeating water on the filter tube 512, it is equipped with one-level whirl impeller 511 to be close to mounting panel 52 department in the barrel, one section barrel of keeping away from mounting panel 52 sets up to the toper, the toper design has the effect of venturi, when the air current was through this toper section, air current speed can be accelerated. The first-stage cyclone impeller 511 forms a vortex in the filtering cylinder 512 with the flue gas containing dust droplets, the dust droplets in the flue gas are thrown onto the cylinder wall of the filtering cylinder 512, and the dust droplets are thrown out of the filtering cylinder 512 along the permeable holes 513 by centrifugal force by using the centrifugal principle, collected by the sewage box 12 arranged below the main air duct 4 and discharged by the sewage outlet 13, so that the purpose of gas-liquid separation is achieved. When the dust-containing liquid drops pass through the primary filtering device 5 along with the flue gas flow, the dust-containing liquid drops are dispersed, adsorbed and filtered by the filter cartridges arranged on the mounting plate 52, the adsorption efficiency is higher, the filtering effect is better, most dust-containing liquid drops can be filtered at one time, and the dust-containing liquid drops which are smaller in particle diameter and not captured can enter the secondary filtering device 9 along with the air flow. The rear of the main air duct 4 is connected with a secondary filtering device 9, the barrel of the secondary filtering device 9 and the main air duct 4 are arranged in the same diameter, the inner wall of the barrel of the secondary filtering device 9 is provided with a plurality of longitudinal wave-shaped guide grooves 92, a water throwing barrel 93 is coaxially arranged in the secondary filtering device 9, a cavity is reserved between the water throwing barrel 93 and the barrel of the secondary filtering device 9, one side of the water throwing barrel 93 is fixedly connected with a motor protective cover 7, one end of the water throwing barrel 93 connected with the motor protective cover 7 protrudes out of the barrel of the secondary filtering device 9, so that a water retaining groove 8 is formed at the joint of the water throwing barrel 93 and the main air duct 4, the water retaining groove can further help to intercept dust-containing liquid drops discharged from the primary filtering device, and further plays a role in adsorption and separation; the water throwing cylinder 93 is provided with a plurality of irregular water throwing holes 94, a secondary rotational flow impeller 91 is arranged in the water throwing cylinder 93 and close to one side of the motor protective cover 7, an air outlet cylinder 96 is arranged at an air outlet of a cylinder body of the secondary filtering device 9, and a horn-shaped water returning cylinder 95 is arranged at the inner side of the air outlet cylinder 96, so that the water-air separation efficiency can be further improved, the dust removal effect can be ensured, the drying degree of finally discharged gas can be ensured, the normal working environment of a construction site can be ensured, and the influence of overlarge humidity on the health of constructors can be avoided; the main air duct 4 and the secondary filtering device 9 are provided with sewage boxes 12 below, and the sewage boxes 12 are connected with sewage outlets 13. After the accelerated gas containing fine dust droplets passes through the second-stage rotational flow impeller, a larger centrifugal force can be obtained, and the ultra-fine dust droplets in the flue gas are thrown out of the water throwing cylinder, flow into the sewage box along the flow guide groove and are finally discharged through the sewage discharge outlet. In order to reduce the harm of noise generated by the dust removal fan in work to the body of site construction personnel, the outer surfaces of the main air duct 4 and the secondary filtering device 9 are coated with a silencing device 10, and the silencing device 10 is filled with sound absorption materials. The dust detector 14 is arranged in the air outlet cylinder 4, and when the dust contained in the air is not much or the dust removal requirement is low, the main controller automatically adjusts the speed of the motor through signal feedback, reduces the load of the motor and plays a role in energy conservation and emission reduction.
The specific working process of the utility model is as follows: the dust detector 14 arranged at the front end detects the concentration of dust in the flue gas and feeds the concentration back to the main controller, and the main controller automatically adjusts the speed of the motor 6 and simultaneously starts the spraying device 2. Dust-containing gas enters the interior of a dust removal fan through an air inlet cylinder 1, an impeller 3 which runs at a high speed enables negative pressure to be formed in the air inlet cylinder 1, meanwhile, an external water source is introduced into a fan flow channel by a spraying device 2 and is atomized, the dust-containing gas enters an atomization area under the action of the negative pressure and is fully contacted with water mist to form a liquid drop shape, the dust-containing gas is pressurized by the impeller 3 and then is thrown out and dispersed into a primary filtering device 5 between a main air cylinder 4 and a motor protection cover 7, when the dust-containing gas passes through a filter cylinder 51 at the rear end of the impeller 3, the wind flow direction is forcibly changed by a primary rotational flow impeller 511, so that the humid gas rotates in an external spiral shape, liquid drops containing particles in the gas are thrown out of the filter cylinder 512 along water permeable holes 513 on the inner wall of the filter cylinder 512 and fall into a bottom sewage box 12 to form primary filtering dust removal; subsequent not subsequent behind the follow-up acceleration of the granule dusty liquid drop of caught through primary filter 5, when unpowered second grade whirl impeller 91, under second grade whirl impeller 91's effect, form the secondary rotation, when the section of thick bamboo 93 that gets rid of, it has arranged irregular hole 94 that gets rid of on the section of thick bamboo 93 to get rid of, dusty gas is when getting rid of hole 94, moisture and gas separation in the gas, it flows into along guiding gutter 92 and collects the sewage box of below to contain sewage drop, and simultaneously, install the water return section of thick bamboo 95 of equipment export and also will purify the gaseous moisture of back and further intercept, finally dry clean gas is discharged through play chimney 96, reach the mesh that purifies the wind stream.
Claims (5)
1. The utility model provides a high-efficient wet dust removal fan of mining bispin flow, includes air inlet cylinder, atomizer, impeller, main dryer, one-level filter equipment, cartridge filter, mounting panel, one-level whirl impeller, filters the barrel, the hole of permeating water, motor safety cover, manger plate recess, second grade filter equipment, second grade whirl impeller, guiding gutter, get rid of a water section of thick bamboo, get rid of the water hole, return a water section of thick bamboo, play dryer, silencing device, ventilation pipe, sewage box, drain, dust detector, its characterized in that: an air inlet cylinder is arranged on one side of a main air cylinder, a dust detector is arranged at the front end of the air inlet cylinder, a spraying device is arranged on the cylinder wall of the air inlet cylinder in a penetrating way, a nozzle of the spraying device is correspondingly arranged at the axis position of the air inlet cylinder, a motor is arranged in the cylinder body of the main air cylinder, an impeller is connected onto an output shaft of the motor, a motor protective cover is arranged on the periphery of a motor body, an air exhaust channel is arranged in the space between the main air cylinder and the motor protective cover, a primary filtering device is arranged in the air exhaust channel and consists of a plurality of groups of filter cylinders and a mounting plate, the mounting plate is an annular plate, the diameter of the inner ring of the mounting plate is the same as the outer diameter of the motor protective cover, the inner ring sleeve is fixed on the motor protective cover, the diameter of the outer ring is the same as the inner diameter of the cylinder body of the main air cylinder, the outer ring is fixedly connected on the inner wall of the main air cylinder, the mounting plate is uniformly provided with a plurality of filter cylinders along the periphery of the motor protective cover, and a plurality of water permeable holes are arranged on the filter cylinder body, a first-stage rotational flow impeller is arranged in the cylinder body close to the mounting plate, and a section of the cylinder body far away from the mounting plate is conical; the rear of the main air cylinder is connected with a secondary filtering device, a cylinder body of the secondary filtering device and the main air cylinder are arranged in the same diameter, the inner wall of the cylinder body of the secondary filtering device is provided with a plurality of longitudinal wave-shaped diversion grooves, a water throwing cylinder is coaxially arranged in the secondary filtering device, a cavity is reserved between the water throwing cylinder and the cylinder body of the secondary filtering device, one side of the water throwing cylinder is fixedly connected with a motor protective cover, one end of the water throwing cylinder, which is connected with the motor protective cover, protrudes out of the cylinder body of the secondary filtering device to form a water retaining groove at the joint of the water throwing cylinder and the main air cylinder, the water throwing cylinder is provided with a plurality of water throwing holes, a secondary rotational flow impeller is arranged at one side, which is close to the motor protective cover, of the water throwing cylinder, an air outlet cylinder is arranged at the air outlet cylinder, and a horn-shaped water returning cylinder is arranged at the inner side of the air outlet cylinder; and sewage boxes are arranged below the main air duct and the secondary filtering device barrel, and are connected with sewage outlets.
2. The mining double-cyclone efficient wet dust removal fan as claimed in claim 1, wherein: the motor protection cover on be equipped with 2 at least group ventilation pipes, link up and set up between motor protection cover and main dryer and switch on with the external world, the ventilation pipe sets up in motor protection cover rear, arranges the position in between the one-level filter equipment toper section barrel.
3. The mining double-cyclone efficient wet dust removal fan as claimed in claim 1, wherein: the outer surfaces of the main air duct and the secondary filtering device barrel are coated with silencing devices, and sound absorbing materials are filled in the silencing devices.
4. The mining double-cyclone efficient wet dust removal fan as claimed in claim 1, wherein: the impeller can be made into any one of a centrifugal type, a mixed flow type and an axial flow type.
5. The mining double-cyclone efficient wet dust removal fan as claimed in claim 1, wherein: the dust detector is connected with a main controller, and the main controller is connected with the motor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122287668.7U CN215822682U (en) | 2021-09-22 | 2021-09-22 | Mining double-cyclone efficient wet dust removal fan |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122287668.7U CN215822682U (en) | 2021-09-22 | 2021-09-22 | Mining double-cyclone efficient wet dust removal fan |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114984706A (en) * | 2022-06-20 | 2022-09-02 | 湖北中船气体有限公司 | Special filter that contains noise cancelling function of roots blower |
| CN115445359A (en) * | 2021-09-22 | 2022-12-09 | 盐城市兰丰环境工程科技有限公司 | Mining double-cyclone efficient wet dust removal fan |
| CN117160173A (en) * | 2023-10-16 | 2023-12-05 | 中国矿业大学 | Air purification system and purification method for return air roadway |
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2021
- 2021-09-22 CN CN202122287668.7U patent/CN215822682U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115445359A (en) * | 2021-09-22 | 2022-12-09 | 盐城市兰丰环境工程科技有限公司 | Mining double-cyclone efficient wet dust removal fan |
| CN115445359B (en) * | 2021-09-22 | 2024-06-07 | 盐城市兰丰环境工程科技有限公司 | Mining double-cyclone high-efficiency wet dust removal fan |
| CN114984706A (en) * | 2022-06-20 | 2022-09-02 | 湖北中船气体有限公司 | Special filter that contains noise cancelling function of roots blower |
| CN114984706B (en) * | 2022-06-20 | 2023-10-27 | 湖北中船气体有限公司 | Special filter that contains amortization function of roots blower |
| CN117160173A (en) * | 2023-10-16 | 2023-12-05 | 中国矿业大学 | Air purification system and purification method for return air roadway |
| CN117160173B (en) * | 2023-10-16 | 2024-05-17 | 中国矿业大学 | Air purification system and purification method for return air roadway |
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