CN101590353A - Spray centrifugal dust-removing fan - Google Patents
Spray centrifugal dust-removing fan Download PDFInfo
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- CN101590353A CN101590353A CNA200910016265XA CN200910016265A CN101590353A CN 101590353 A CN101590353 A CN 101590353A CN A200910016265X A CNA200910016265X A CN A200910016265XA CN 200910016265 A CN200910016265 A CN 200910016265A CN 101590353 A CN101590353 A CN 101590353A
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Abstract
The invention discloses a kind of spray centrifugal dust-removing fan, blower fan is installed in the middle part in the air duct, and sprayer unit is arranged on the air inlet, and draught fan impeller is corresponding with sprayer unit, and separator is arranged on the rear portion of draught fan impeller and corresponding with it; Connect outer tube wall on the air duct outer wall, the outer tube wall bottom offered the mouth of a river, water tank with strainer is with the connection of outer tube wall bottom and with the mouth of a river is corresponding excessively, the water tank with strainer bottom is provided with sewage draining exit, outer tube wall is connected on the position of air duct outer wall postmedian, between the postmedian of air duct outer wall and the outer tube wall cavity is arranged, offer several through holes that communicate with cavity on the postmedian wall of air duct, the front end of outer tube wall is corresponding with the rear portion of draught fan impeller.It is obstructed and influence efficiency of dust collection that the present invention can solve sewer that prior art exists, and the fine solid particle in the dust laden air is difficult for catching and influences the problem of dedusting quality.
Description
Technical field
The present invention relates to the cleaner technical field, specifically a kind of spray centrifugal dust-removing fan that is used for down-hole, mine removal scope of operation surrounding air dust.
Background technology
At present; in the more serious places of dust pollution such as mine underground work and constructing tunnels; mostly adopt the dust arrester of filter net type that the dust in the dust laden air is removed by the circulating filtration form, purify the air of operation, construction site with this, the protection staff's is healthy.This dust arrester mainly is to filter dust in the dust laden air by the minimum filter screen of mesh, but, because of filter screen can adsorb increasing dust in the middle of using, make that the resistance of air circulation is increasing, the load that causes blower motor thus constantly increases, it has not only been wasted the energy, has influenced efficiency of dust collection, and is easy to cause burning of blower motor.
Chinese patent 200820021354.4 discloses a kind of Wet-type dust-removal fan, it takes dust laden air water spray and unpack format in being inhaled into air duct, it separates it after can making dust form the dust-laden drop, and by the sewage discharge of several through holes on the air duct with the formation of dust-laden drop, it need not adopt filter screen can reach the purpose of removing dust in the dust laden air, so fundamentally solved the existing problems of above-mentioned technology.But, there is following shortcoming in it in the middle of reality is used: one, sewer is obstructed and influence efficiency of dust collection, because of the interlayer cavity that is provided with on the air duct and the equal in length of whole air duct, several through holes of offering on the air duct are distributed on the whole inner tube wall, blower fan is arranged on the medium position in the air duct, when draught fan impeller rotates, the front side of draught fan impeller is in negative pressure state, the rear side of draught fan impeller is in barotropic state, that is: the front portion is negative pressure state in the air duct, postmedian is barotropic state, thus, several through holes that occupy front portion in the air duct are under the negative pressure state effect, be easy to generate the obstructed situation of sewer, and cause the problem that efficiency of dust collection reduces thus easily; Two, fine solid particle in the dust laden air is difficult for catching and influences the dedusting quality, because of it takes simple mixed form to the dust laden air water spray, reach water mist particle directly with dust laden air in the powder dust particle purpose of colliding mutually and mixing, but because water mist particle and powder dust particle all are in the high-speed motion state, its probability that collides mutually can be subjected to influence to a certain degree, particularly the movement velocity of fine solid particle is faster, the probability that it and water mist particle collide mutually is lower, therefore, this simple mixed form be difficult to guarantee water mist particle can with powder dust particle, the particularly effective collision of fine solid particle, be difficult to the degree and the quality that guarantee that they mix mutually, so badly influence powder dust particle, fine solid particle capture rate particularly.
Summary of the invention
The purpose of this invention is to provide a kind of spray centrifugal dust-removing fan, it need not adopt the strainer filtering form can reach the purpose of dust in effective removal dust laden air, it is obstructed and influence efficiency of dust collection that it can solve sewer that prior art exists, and the fine solid particle in the dust laden air is difficult for catching and influences the problem of dedusting quality.
The objective of the invention is to be achieved through the following technical solutions: spray centrifugal dust-removing fan, it comprises air duct, the air duct rear and front end has air inlet and the air outlet that communicates with each other respectively, blower fan of being made up of blower motor and draught fan impeller and sprayer unit, separator are connected in the air duct, blower fan is installed in the middle part in the air duct, sprayer unit is arranged on the air inlet, and draught fan impeller is corresponding with sprayer unit, and separator is arranged on the rear portion of draught fan impeller and corresponding with it; Connect outer tube wall on the air duct outer wall, the outer tube wall bottom offered the mouth of a river, water tank with strainer is with the connection of outer tube wall bottom and with the mouth of a river is corresponding excessively, the water tank with strainer bottom is provided with sewage draining exit, outer tube wall is connected on the position of air duct outer wall postmedian, between the postmedian of air duct outer wall and the outer tube wall cavity is arranged, offer several through holes that communicate with cavity on the postmedian wall of air duct, the front end of outer tube wall is corresponding with the rear portion of draught fan impeller.
For further realizing purpose of the present invention, also can finish by the following technical programs: connect the water curtain net in the air duct, the water curtain net is arranged between draught fan impeller and the sprayer unit.Connect first collecting ring in the air duct, first collecting ring is arranged on the rear portion of separator.The resistance absorber that is the circular arc taper is installed in the air inlet, and resistance absorber is connected with the air duct inwall by the fixed mount on it.The rectifier that is the circular arc taper is installed in the air outlet, and rectifier is connected with the air duct inwall by the support on it.Connect second separator in the air duct, second separator is arranged in the air outlet, and second collecting ring is installed in the air outlet, and second collecting ring is connected with air duct, and second collecting ring is arranged on the rear portion of second separator.Rectifier is connected on the center of second separator.Water circulating pump is installed on the outer tube wall, water circulating pump by pipeline one end be connected with sprayer unit, the other end is connected with water tank with strainer and communicate.Connect support in the air duct, install on the support and separate impeller, separate impeller and be arranged between the separator and second separator.Offer suitable for reading on the top at air duct middle part, the casing that the upper end offers thermovent is arranged in the air duct, and be connected with suitable for reading, have between casing and the air duct inwall at interval, blower motor is installed in the casing, draught fan impeller is provided with in the air duct, and the terminal box that is connected with blower motor is arranged on the top of thermovent.
The beneficial effect that the present invention can produce: because of outer tube wall being connected on the position of air duct outer wall postmedian, between the postmedian of air duct outer wall and the outer tube wall cavity is arranged, offer several through holes that communicate with cavity on the postmedian wall of air duct, the front end of outer tube wall is corresponding with the rear portion of draught fan impeller, so several through holes of offering on the air duct all are under the barotropic state, the smooth and easy inflow in the cavity by through hole of the sewage that it can make the dust-laden drop form is discharged from, whole sewer process has can not be subjected to the distinguishing feature that the interior front portion of air duct is any influence of negative pressure state, so effectively improved efficiency of dust collection, and reduced certain energy consumption and noise;
Because of the front portion in air duct connects the water curtain net, the water curtain net is arranged on the anterior and corresponding with sprayer unit of draught fan impeller, the water smoke that sprayer unit sprays can form drop and moisture film on the net at water curtain, when dust laden air passes through on it, drop and moisture film can make the powder dust particle and the fine solid particle that are in the high-speed motion state collide with it, fully mix mutually with it, guaranteed degree and the quality that they mix mutually with this, so, the water curtain net not only can be caught the powder dust particle in the dust laden air, and can effectively catch the airborne fine solid particle of dirt, it has fundamentally guaranteed the dedusting quality, and has not the advantage that can be stopped up by powder dust particle.
It is unobstructed that the present invention has a sewer, the efficiency of dust collection ideal, and can catch fine solid particle in the dust laden air, and the remarkable advantage that the dedusting quality is high, extensive use can produce tangible society, economic benefit.
Description of drawings
Fig. 1 is a structural representation of the present invention.
The specific embodiment
Spray centrifugal dust-removing fan of the present invention, it comprises air duct 1, air duct 1 rear and front end has air inlet 1a and the air outlet 1b that communicates with each other respectively, blower fan of being made up of blower motor 22 and draught fan impeller 22a and sprayer unit 2, separator 23 are connected in the air duct 1, blower fan is installed in the middle part in the air duct 1, sprayer unit 2 is arranged on the air inlet 1a, and draught fan impeller 22a is corresponding with sprayer unit 2, and separator 23 is arranged on the rear portion of draught fan impeller 22a and corresponding with it; Connect outer tube wall 11 on air duct 1 outer wall, outer tube wall 11 bottoms offered mouth of a river 11a, water tank with strainer 13 is with the connection of outer tube wall 11 bottoms and with mouth of a river 11a is corresponding excessively, water tank with strainer 13 bottoms are provided with sewage draining exit 14, outer tube wall 11 is connected on the position of air duct 1 outer wall postmedian, between the postmedian of air duct 1 outer wall and the outer tube wall 11 cavity 12 is arranged, offer several through holes 1c that communicates with cavity 12 on the postmedian wall of air duct 1, the front end of outer tube wall 11 is corresponding with the rear portion of draught fan impeller 22a.Connect water curtain net 5 in the air duct 1, water curtain net 5 is arranged between draught fan impeller 22a and the sprayer unit 2.Connect the rear portion that first collecting ring, 24, the first collecting rings 24 are arranged on separator 23 in the air duct 1.The resistance absorber 4 that is the circular arc taper is installed in the air inlet 1a, and resistance absorber 4 is connected with air duct 1 inwall by the fixed mount 3 on it.The rectifier 32 that is the circular arc taper is installed in the air outlet 1b, and rectifier 32 is connected with air duct 1 inwall by the support on it.Connect second separator, 31, the second separators 31 in the air duct 1 and be arranged in the air outlet 1b, second collecting ring, 33, the second collecting rings 33 are installed in the air outlet 1b are connected with air duct 1, second collecting ring 33 is arranged on the rear portion of second separator 31.Rectifier 32 is connected on the center of second separator 31.Water circulating pump 6 is installed on the outer tube wall 11, water circulating pump 6 by pipeline one end be connected with sprayer unit 2, the other end is connected with water tank with strainer 13 and communicate.Connect support 41 in the air duct 1, install on the support 41 and separate impeller 42, separate impeller 42 and be arranged between the separator 23 and second separator 31.Offer suitable for reading on the top at air duct 1 middle part, the casing 21 that the upper end offers thermovent is arranged in the air duct 1, and be connected with suitable for reading, have between casing 21 and air duct 1 inwall at interval, blower motor 22 is installed in the casing 21, draught fan impeller 22a is provided with in the air duct 1, and the terminal box 22b that is connected with blower motor 22 is arranged on the top of thermovent.
Embodiment 1:
Blower fan is installed in middle part in the air duct 1, sprayer unit 2 is connected on the air inlet 1a of air duct 1, water curtain net 5 is arranged between draught fan impeller 22a and the sprayer unit 2, and draught fan impeller 22a is corresponding with water curtain net 5, and separator 23 is arranged on the rear portion of draught fan impeller 22a and corresponding with it; Connect outer tube wall 11 on air duct 1 outer wall, outer tube wall 11 bottoms offered mouth of a river 11a, water tank with strainer 13 is with the connection of outer tube wall 11 bottoms and with mouth of a river 11a is corresponding excessively, water tank with strainer 13 bottoms are provided with sewage draining exit 14, outer tube wall 11 is connected on the postmedian position of air duct 1 outer wall, between the postmedian of air duct 1 outer wall and the outer tube wall 11 cavity 12 is arranged, offer several through holes 1c that communicates with cavity 12 on the postmedian wall of air duct 1, the front end of outer tube wall 11 is corresponding with the rear portion of draught fan impeller 22a, and first collecting ring 24 is arranged on the rear portion of separator 23; In the air inlet 1a of air duct 1 resistance absorber 4 is set, resistance absorber 4 is connected with air duct 1 inwall by fixed mount 3; In the air outlet 1b of air duct 1 rectifier 32 is set, rectifier 32 is connected with air duct 1 inwall by support.Offer suitable for reading on the top at air duct 1 middle part, the casing 21 that the upper end offers thermovent is arranged in the air duct 1, and be connected with suitable for reading, have between casing 21 and air duct 1 inwall at interval, blower motor 22 is installed in the casing 21, draught fan impeller 22a is provided with in the air duct 1, and the terminal box 22b that is connected with blower motor 22 is arranged on the top of thermovent.
Duty is described: when blower fan working fan impeller 22a rotates, the front portion of draught fan impeller 22a is in negative pressure state, the postmedian of draught fan impeller 22a is in barotropic state, that is: the front portion is a negative pressure state in the air duct 1, postmedian is a barotropic state, sprayer unit 2 is connected with water supply pipe, the water smoke that sprayer unit 2 sprays can form drop and moisture film on water curtain net 5, when dust laden air passes through on it, drop and moisture film can make the powder dust particle and the fine solid particle that are in the high-speed motion state collide with it, fully mix mutually with it, with this powder dust particle in dust laden air and fine solid particle are caught, form the dust-laden drop, dust-containing liquid drops in the first separation effect of draught fan impeller 22a and is thrown on the postmedian inwall of air duct 1 down, the sewage that the dust-laden drop is formed is smooth and easy to be flowed in the cavity 12 by several through holes 1c, and is discharged from by crossing mouth of a river 11a inflow water tank with strainer 13.
Owing in air duct 1, connect separator 23, separator 23 is arranged on the rear portion of draught fan impeller 22a and corresponding with it, it can carry out the dust laden air after draught fan impeller 22a first separation the second time and separate, further the dust-laden drop is thrown on the postmedian inwall of air duct 1, the smooth and easy inflow in the cavity 12 by several through holes 1c of sewage that the dust-laden drop is formed is discharged from, and makes dust removing effects desirable more.Owing in air duct 1, connect first collecting ring 24, first collecting ring 24 is arranged on the rear portion of separator 23, so it can make the dust-laden droplet congregating on the postmedian inwall of being thrown to air duct 1 form sewage, and can impel the well-regulated bottom in air duct 1 of its sewage to flow.Because the resistance absorber 4 that is the circular arc taper is installed in air inlet 1a, resistance absorber 4 is connected with air duct 1 by the fixed mount 3 on it, it can make the air-flow that enters in the air duct 1 steadily be quickened, so it has played raising air-flow efficient, has guaranteed that intake velocity is even, the effect of reduction work noise.Because the rectifier 32 that is the circular arc taper is installed in air outlet 1b, it can make the dynamic pressure of air outlet 1b obtain reclaiming, so it can improve the static pressure efficiency and the ability to work of blower fan, has played the effect that reduces work noise simultaneously.Owing on the top at tube 1 middle part, offer suitable for reading, the casing 21 that the upper end offers thermovent is arranged in the air duct 1, and be connected with suitable for reading, so it can make blower motor 22 outwards dispel the heat by the thermovent of casing 21, to guarantee the operate as normal of blower motor 22.
Embodiment 2:
On the basis of embodiment 1, in air duct 1, connect second separator 31 again, second separator 31 is arranged in the air outlet 1b, and second collecting ring 33 is installed in air outlet 1b, second collecting ring 33 and 1 interior connection of air duct, second collecting ring 33 is arranged on the rear portion of second separator 31, and rectifier 32 is connected on the center of second separator 31.
Owing in air duct 1, connect second separator 31, second separator 31 is arranged in the air outlet 1b, it will separate for the third time through the dust laden air after separator 23 secondary separations again, it can further be thrown to the dust-laden drop on the rear inside wall of air duct 1 again, the smooth and easy inflow in the cavity 12 by several through holes 1c of sewage that the dust-laden drop is formed is discharged from, and the dedusting quality is further improved.Because second collecting ring 33 is installed in air outlet 1b, second collecting ring 33 and 1 interior connection of air duct, second collecting ring 33 is arranged on the rear portion of second separator 31, so it can make the dust-laden drop of being thrown on air duct 1 rear inside wall assemble formation sewage once more, and can impel its well-regulated bottom in air duct 1 to flow once more, to carry moisture in the air of effectively avoiding air outlet 1b to be discharged.
Embodiment 3:
On the basis of embodiment 1 and embodiment 2, water circulating pump 6 is installed on outer tube wall 11, since water circulating pump 6 by pipeline one end be connected with sprayer unit 2, the other end is connected with water tank with strainer 13 and communicate, so it can make the sewage that flows in the water tank with strainer 13 be re-used as sprayer unit 2 water sources after treatment, recycle with this and reach water-saving purpose.It is known technology that the sewage draining exit 14 of water tank with strainer 13 is provided with sewage draining valve.
Embodiment 4:
On the basis of embodiment 1, embodiment 2 and embodiment 3, in air duct 1, connect support 41, install on the support 41 and separate impeller 42, separating impeller 42 is arranged between the separator 23 and second separator 31, can further improve centrifugal force owing to separate impeller 42, so it can make the dust-laden drop throw to better effects if on air duct 1 rear inside wall, make dust removing effects desirable more.
According to circumstances in air duct 1, also can set up several collecting rings, to carry moisture in the air of further avoiding air outlet 1b to be discharged.The separator 23 and second separator 31 are circumferential arrangement by several guide vanes and consist of known technology.
Control circuit of the present invention partly is a known technology.
Technical scheme of the present invention is not limited only to the embodiment of present embodiment record, can also have other embodiment to finish technical scheme of the present invention.
The technology that the present invention does not describe in detail, shape, structure partly are known technology.
Claims (10)
1, spray centrifugal dust-removing fan, it comprises air duct (1), air duct (1) rear and front end has air inlet (1a) and the air outlet (1b) that communicates with each other respectively, blower fan of being made up of blower motor (22) and draught fan impeller (22a) and sprayer unit (2), separator (23) are connected in the air duct (1), blower fan is installed in the middle part in the air duct (1), sprayer unit (2) is arranged on the air inlet (1a), draught fan impeller (22a) is corresponding with sprayer unit (2), and separator (23) is arranged on the rear portion of draught fan impeller (22a) and corresponding with it; Connect outer tube wall (11) on air duct (1) outer wall, outer tube wall (11) bottom offered the mouth of a river (11a), water tank with strainer (13) connects with outer tube wall (11) bottom and is corresponding with the mistake mouth of a river (11a), water tank with strainer (13) bottom is provided with sewage draining exit (14), it is characterized in that: outer tube wall (11) is connected on the position of air duct (1) outer wall postmedian, between the postmedian of air duct (1) outer wall and the outer tube wall (11) cavity (12) is arranged, offer several through holes (1c) that communicate with cavity (12) on the postmedian wall of air duct (1), the front end of outer tube wall (11) is corresponding with the rear portion of draught fan impeller (22a).
2, spray centrifugal dust-removing fan according to claim 1 is characterized in that: connect water curtain net (5) in the air duct (1), water curtain net (5) is arranged between draught fan impeller (22a) and the sprayer unit (2).
3, spray centrifugal dust-removing fan according to claim 1 is characterized in that: connect first collecting ring (24) in the air duct (1), first collecting ring (24) is arranged on the rear portion of separator (23).
4, spray centrifugal dust-removing fan according to claim 1 is characterized in that: the resistance absorber (4) that is the circular arc taper is installed in the air inlet (1a), and resistance absorber (4) is connected with air duct (1) inwall by the fixed mount (3) on it.
5, spray centrifugal dust-removing fan according to claim 1 is characterized in that: the rectifier (32) that is the circular arc taper is installed in the air outlet (1b), and rectifier (32) is connected with air duct (1) inwall by the support on it.
6, spray centrifugal dust-removing fan according to claim 1, it is characterized in that: connect second separator (31) in the air duct (1), second separator (31) is arranged in the air outlet (1b), second collecting ring (33) is installed in the air outlet (1b), second collecting ring (33) is connected with air duct (1), and second collecting ring (33) is arranged on the rear portion of second separator (31).
7, according to claim 5 or 6 described spray centrifugal dust-removing fans, it is characterized in that: rectifier (32) is connected on the center of second separator (31).
8, spray centrifugal dust-removing fan according to claim 1, it is characterized in that: outer tube wall (11) go up to be installed water circulating pump (6), water circulating pump (6) by pipeline one end be connected with sprayer unit (2), the other end is connected with water tank with strainer (13) and communicate.
9, according to claim 1 or 6 described spray centrifugal dust-removing fans, it is characterized in that: connect support (41) in the air duct (1), support (41) is gone up to install and is separated impeller (42), separates impeller (42) and is arranged between separator (23) and second separator (31).
10, spray centrifugal dust-removing fan according to claim 1, it is characterized in that: offer suitable for reading on the top at air duct (1) middle part, the casing (21) that the upper end offers thermovent is arranged in the air duct (1), and be connected with suitable for reading, have between casing (21) and air duct (1) inwall at interval, blower motor (22) is installed in the casing (21), and draught fan impeller (22a) is provided with in the air duct (1), and the terminal box (22b) that is connected with blower motor (22) is arranged on the top of thermovent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200910016265XA CN101590353A (en) | 2009-06-23 | 2009-06-23 | Spray centrifugal dust-removing fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200910016265XA CN101590353A (en) | 2009-06-23 | 2009-06-23 | Spray centrifugal dust-removing fan |
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| Publication Number | Publication Date |
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| CN101590353A true CN101590353A (en) | 2009-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA200910016265XA Pending CN101590353A (en) | 2009-06-23 | 2009-06-23 | Spray centrifugal dust-removing fan |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102000469A (en) * | 2010-09-27 | 2011-04-06 | 广州市合联科技发展有限公司 | Cyclone water bath air cleaning device and cleaning method thereof |
| CN102008866A (en) * | 2010-03-31 | 2011-04-13 | 郭峰 | Spray centrifugal dedusting fan |
| CN110664314A (en) * | 2019-10-10 | 2020-01-10 | 沈雪峰 | Automatic cleaning and dust removing device with centrifugal dewatering function |
| CN111085058A (en) * | 2019-12-04 | 2020-05-01 | 江苏农林职业技术学院 | Building decoration environmental protection dust collecting equipment |
| CN111298581A (en) * | 2020-04-07 | 2020-06-19 | 株洲市东亨科技有限责任公司 | Dust collector that subway tunnel construction used |
| CN112387055A (en) * | 2020-11-27 | 2021-02-23 | 哈尔滨盛迪电力设备有限公司 | Self-cleaning centrifugal water mist-proof multi-stage energy-saving water curtain dust removal device |
| CN112855583A (en) * | 2021-02-26 | 2021-05-28 | 南通钜拓环保科技有限公司 | Vortex mixing wheel axle dewatering type dust removing fan |
-
2009
- 2009-06-23 CN CNA200910016265XA patent/CN101590353A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102008866A (en) * | 2010-03-31 | 2011-04-13 | 郭峰 | Spray centrifugal dedusting fan |
| WO2011120208A1 (en) * | 2010-03-31 | 2011-10-06 | Guo Feng | Spraying centrifugal dust remove blower |
| CN102008866B (en) * | 2010-03-31 | 2012-10-03 | 郭峰 | Spray centrifugal dedusting fan |
| CN102000469A (en) * | 2010-09-27 | 2011-04-06 | 广州市合联科技发展有限公司 | Cyclone water bath air cleaning device and cleaning method thereof |
| CN102000469B (en) * | 2010-09-27 | 2012-08-08 | 广州市合联科技发展有限公司 | Cyclone water bath air cleaning device and cleaning method thereof |
| CN110664314A (en) * | 2019-10-10 | 2020-01-10 | 沈雪峰 | Automatic cleaning and dust removing device with centrifugal dewatering function |
| CN110664314B (en) * | 2019-10-10 | 2021-08-31 | 山东华歌建筑设计有限公司 | Automatic cleaning and dust removing device with centrifugal dewatering function |
| CN111085058A (en) * | 2019-12-04 | 2020-05-01 | 江苏农林职业技术学院 | Building decoration environmental protection dust collecting equipment |
| CN111298581A (en) * | 2020-04-07 | 2020-06-19 | 株洲市东亨科技有限责任公司 | Dust collector that subway tunnel construction used |
| CN112387055A (en) * | 2020-11-27 | 2021-02-23 | 哈尔滨盛迪电力设备有限公司 | Self-cleaning centrifugal water mist-proof multi-stage energy-saving water curtain dust removal device |
| CN112855583A (en) * | 2021-02-26 | 2021-05-28 | 南通钜拓环保科技有限公司 | Vortex mixing wheel axle dewatering type dust removing fan |
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Open date: 20091202 |