CN101074072B - Spray powder humidifier and powder dust-free loader based on spray powder humidification - Google Patents
Spray powder humidifier and powder dust-free loader based on spray powder humidification Download PDFInfo
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- CN101074072B CN101074072B CN2007100517535A CN200710051753A CN101074072B CN 101074072 B CN101074072 B CN 101074072B CN 2007100517535 A CN2007100517535 A CN 2007100517535A CN 200710051753 A CN200710051753 A CN 200710051753A CN 101074072 B CN101074072 B CN 101074072B
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Abstract
The invention is concerned with the spray powder wetting method and the equipment and the powder non-dust car loader. The equipment includes the powder dust-transporting equipment, which includes at least the vertical dust-transporting section, sets the vertical powder blending transporting equipment in the vertical dust-transporting section, the spray wetting equipment in the vertical dust-transporting section. Based on it, connects the corresponding equipment to form the powder non-dust car loader for the spray powder wetting. The invention can solve the problems, such as the felt of the wetting powder in the vertical transporting section that can block or flood, high power of the electric motor.
Description
Technical field
The invention belongs to the dust-free loader of powder humidifier and powder, be specifically related to have that vertical humidification scrapes that material mixes the powder humidifier of conveying mechanism and based on the powder dust-free loader of spray powder humidification.
Background technology
Present damping device and blast furnace gravity blast furnace dust catcher unload dust that ash and common dust exhaustor collect and the damping device in other granular material, be to add water at horizontal segment and stir and carry humidification since powder adds water stir after transporting resistance big; Slimy powder is on mixing device and casing, and it is stifled to cause humidifying to be prone to card, and the mechanical equipment fault rate is big; Repair and maintenance is difficult; And the power energy consumption of load transfer device is also corresponding bigger, the more important thing is that this kind equipment requires very strictness to the water yield coupling that humidification stirs, and adds too much like the water yield; Can cause the phenomenon of closing sposh; Add lessly, can not realize the abundant humidification of powder, so that can't realize the environmental protection index of dustless loading.Other has vertical interior endless tube spray ash-discharging device, is at vertical section a plurality of endless tubes to be set, and bores all apertures on the endless tube and sprays humidification.Because structure is simpler, there is not the clearing apparatus of auxiliary abundant damping device and transportation section, can not realize the abundant humidification of powder, and the muddy powder can stop up in the transportation section, or the water yield adds the stream slurry that causes too much and swings phenomenons such as water.Above-mentioned powder dust-free loader is all based on above-mentioned such wet treatment that adds, and is difficult to administer effectively the airborne dust that dust produces in carrying.
Summary of the invention
The object of the present invention is to provide a kind of in the powder course of conveying, the realization to administer; Avoid producing airborne dust behind powder, the ash discharge; Can realize the spray powder humidifier of the abundant humidification of powder is reached the powder dust-free loader based on the spray powder humidification; And then can realize multistage humidification, to address the above problem.
One of technical scheme of the present invention is: spray powder humidifier, and it comprises the powder ash conveying device, said powder ash conveying device comprises at least vertically fails grey section, vertically fails to establish vertically to scrape in grey section and expects to mix conveying mechanism, vertically fails in grey section and establishes the spray damping device.
Vertically scrape and expect that mixing mechanism comprises drive motor, the rotating shaft of drive motor bonded assembly connects in the rotating shaft to scrape and expects to mix defeated material blade and/or scraper plate.
Case was diffused in the expansion of airborne dust in the terminal connection of said vertically defeated ash section can produce, and expansion is diffused the case end and established the ash hole section; Enlarge to diffuse and establish second stage damping device in the case.
Said expansion is diffused in the case ash hole section and is provided with the spray irrigation device.
Said expansion is diffused case and also is provided with spray equipment outward.
The heating arrangement that also has water jet standpipe that said damping device together is provided with.
Two of technical scheme of the present invention is: based on the powder dust-free loader of spray powder humidification; It comprises the structure of above-mentioned spray powder humidifier; Wherein the powder ash conveying device is connected UNICOM with feed arrangement; The powder ash conveying device is made up of vertical defeated grey ash discharge section or is made up of vertical defeated grey ash discharge section and the defeated ash section of level; The powder ash conveying device is located on the bearing or is located on the support, and said bearing is a kind of in following: fixed bearing maybe can be done two-dimentional rotating hinged-support or three-dimensional rotating hinged-support.
Said powder ash conveying device bonded assembly expansion is diffused case and also is provided with spray equipment outward.
The present invention is employed in to establish in the vertical defeated ash section of ash conveying device and vertically scrapes material and mix conveying mechanism and spray damping device; Scrape material on spray humidification limit, vertical section realization limit and mix conveying; Actv. has solved the abundant humidification of powder, and the tube wall that has also solved simultaneously the vertical defeated ash section of wet mash bonding causes the transportation section to stop up or the water yield adds the stream slurry that causes too much and swings problems such as water; Also solved common humidifier horizontal segment humidification and stirred, the equipment transporting resistance is big, and power of motor is big, energy consumption is big, and the easy card that adheres to of the powder behind the humidification is stifled, water yield match and regulate difficulty, equipment failure rate height, operating maintenance difficulty.And the heating arrangement of setting up has also solved the easy frozen blocking problem of water-injection system in winter.
Multistage humidification is set on this device basic, thoroughly solves the problem of environmental pollution that powder carries the airborne dust that forms because of drop to bring.
This device is used for the powder dust-free loader that the blast furnace loading powder forms the spray powder humidification; Thoroughly having solved existing common humidifier horizontal segment humidification stirs; The equipment transporting resistance is big, and power of motor is big, energy consumption is big, and the easy card that adheres to of the powder behind the humidification is stifled; Water yield match and regulate difficulty; Equipment failure rate is high, the operating maintenance difficulty, and water-injection system was prone to frozen and was difficult to realize dustless loading and environmental protection index problem up to standard owing to humidification is insufficient winter; Also thoroughly having solved the dry type dust-free loader can not be to the abundant humidification of material; The Wet-dry dust-free loader is a spraying humidification again after the low material level of material draws off, owing to high temperature such as gravitational dust collection coal gas ash (about 150 ℃), high pressure (pressure is up to the 0.2-0.4 MPa) are being produced a large amount of steams when material adds wet trade and receiving under the technological condition complex situations such as high concentration coal gas with coal gas ash companion and ejection influences the problem that anti-dust effect is difficult to guarantee.Also thoroughly solved the abundant stirring humidification that the interior endless tube spray of common porous damping device is difficult to realize material; Powder behind the humidification is prone to adhere to the stifled defeated grey blanking section of card and the water yield is difficult to regulate problems such as (water yield are tried to plaster over the differences at the expense of principle greatly, the few weak effect of the water yield); Also thoroughly solved this kind equipment in north of china in winter drenching system easy freezing blocking problem; This device is not only applicable to the defeated grey entrucking of coal gas such as gravity blast furnace dust catcher, coal gas dry-method dust exhaustor, high temperature powder, can be widely used in the dustless humidification car loading operation of common dust exhaustor dust and other powder yet, reaches well-content environment protecting; The reliability of equipment is high; During the loading powder operation, on-the-spot dust concentration is extremely low, can fully guarantee to reach state health standards.
Description of drawings
Fig. 1 multi-stage spray humidification-type powder dust-free loader scheme of installation.
Fig. 2 multi-stage spray humidification-type powder dust-free loader profile scheme drawing.
Fig. 3 multi-stage spray humidification-type structural representation
Spray equipment enlarged drawing in Fig. 4 powder ash conveying device
Second stage spray equipment enlarged drawing in the case is diffused in Fig. 5 expansion
Case ash hole section spray irrigation device enlarged drawing is diffused in Fig. 6 expansion
The outer spray equipment enlarged drawing of case is diffused in Fig. 7 expansion
The specific embodiment
Feeding device in the damping device is made up of vertical defeated grey ash discharge section or is made up of vertical defeated grey ash discharge section and the defeated ash section of level; Be the simple structure that feeding device only is made up of vertical defeated grey ash discharge section, or by vertical defeated grey ash discharge section and level defeated grey section form than labyrinth.Present embodiment section is made up of the defeated ash of vertical defeated grey ash discharge section and level with feeding device and is explained; Vertically scraping of establishing in the vertical defeated ash section expects that mixing conveying mechanism comprises drive motor; The rotating shaft of drive motor bonded assembly connects in the rotating shaft to scrape and expects to mix defeated material blade and/or scraper plate, that is to say can connect in the rotating shaft to scrape to expect to mix the defeated blade of expecting; This blade is continuous helicallobe, or the blade that is provided with at interval along rotating shaft; Or can connect scraper plate in the rotating shaft, scraper plate is provided with vertically at interval; Or connect in the rotating shaft and scrape material and mix defeated material blade and scraper plate.
Damping device is the part of powder dust-free loader in the present embodiment.Feeding device wherein can be fix also can be can do rotating.Present embodiment is explained with the three-dimensional rotating feeding device of being made up of vertical defeated grey ash discharge section and the defeated ash section of level of doing.Damping device its essence is that the material of vertically scraping of powder mixes conveying and humidification, has both comprised that the material of vertically scraping of powder mixed the humidification that conveying also comprises powder.Can it be used for the powder dustless loading and can use it for the dustless conveyor stacker of powder.
As shown in Figure 2, feeding device 5 is the horizontal feed device, establishes the spiral pushing device (not shown) in it, and ash conveying device 5 is communicated with vertical ash discharging gear 8, and vertical ash discharging gear 8 ash discharge sections connect to enlarge diffuses case 9.Enlarge that to diffuse case 9 be to let the powder of the vertical ash discharging gear ash discharge section output funnel type casing of kicking up; Funnel type casing hypomere is the ash hole section 9-1 of cylindrical shape or square tubular or other shapes; Funnel type casing epimere is for enlarging the linkage section 9-2 of shape cylindrical shape or square tubular or other shapes, and linkage section 9-2 is connected with vertical ash discharging gear 8 ash discharge sections; Funnel type casing epimere is connected by linkage section 9-3 with funnel type casing hypomere.
Establish first order spray humidification in the powder ash conveying device, enlarge to diffuse and establish second stage spray equipment in the case.In the present embodiment, as shown in Figure 3, the ash discharge section 8-1 of the vertical ash discharging gear 8 of powder ash conveying device establishes spray equipment 10.Spray equipment 10 comprises coolant inlet pipe 11, and coolant inlet pipe 11 connects water jet standpipe 12, and water jet standpipe 12 can be an annular spray pipe, also can be several sections straight shape jet pipes, is toroidal nozzle among the figure.Offer spray apertures 17 on the water jet standpipe 12 or connect shower nozzle, when adopting shower nozzle, shower nozzle can be an atomizer.Present embodiment adopts spray apertures 17, and spray apertures 17 places establish spray sleeve pipe 41, like Fig. 4.The heating arrangement that also has water jet standpipe that together is provided with spray equipment.Heating arrangement comprises steam inlet duct 23, and steam inlet duct 23 connects heating pipe 14, and heating pipe 14 connects steam return water pipe 15; Be connected heat-conducting plate 16 between heating pipe 14 and the water jet standpipe 12, heating pipe 14 and water jet standpipe 12 are outer can to wrap up warm material, reserves the spray apertures 17 ejection apertures on the water jet standpipe 12 on the warm material or exposes shower nozzle, does not adopt integument in the present embodiment.The heating arrangement of water jet standpipe is in order to solve the problem of water jet standpipe because of freezing and blocking, and is before the spray humidification, the spray damping device to be heated the device support that provides except that the ice thaw processing in the method that Here it is.
Enlarge to diffuse and establish spray equipment 40 in the case 9 and comprise coolant inlet pipe 18, coolant inlet pipe 18 connects water jet standpipes 19, offers spray apertures 20 on the water jet standpipe 19 or connects shower nozzle, and selected shower nozzle can be an atomizer.The heating arrangement that also has jet pipe that together is provided with spray equipment.Heating arrangement comprises steam inlet duct 23, and steam inlet duct 23 connects heating pipe 22, and heating pipe 22 connects steam return water pipe 15; Be connected heat-conducting plate 24 between heating pipe 22 and the water jet standpipe 19.Can wrap up adiabator layer 42 outside heating pipe 22 and the water jet standpipe 19, reserve the spray apertures 20 ejection apertures on the water jet standpipe 19 on the warm material or expose shower nozzle, as shown in Figure 5.
Be provided with the spray irrigation device in the ash hole section 9-1 of funnel type casing hypomere.Spray irrigation device 25 comprises coolant inlet pipe 25-1; Coolant inlet pipe 25-1 connects water jet standpipe 25-2; Offer spray apertures 25-3 on the water jet standpipe 25-2 or connect shower nozzle, selected shower nozzle can be atomizer or Flushing nozzle (not establishing in the present embodiment), and present embodiment adopts hole for water spraying.Hole for water spraying 25-3 establishes at the place hole for water spraying sleeve pipe 25-4, like Fig. 6.The heating arrangement that also has jet pipe that together is provided with spray irrigation device 25.Heating arrangement 26 comprises steam inlet duct 23, and steam inlet duct 23 connects heating pipe 26-2, and heating pipe 26-2 connects steam return water pipe 15, is connected heat-conducting plate 26-4 between heating pipe 26-2 and the water jet standpipe 25-2.Same heating pipe 26-2 and water jet standpipe 25-2 are outer can to wrap up adiabator layer, reserves the spray apertures 25-3 ejection aperture on the water jet standpipe 25-2 on the adiabator layer or exposes shower nozzle.Do not adopt adiabator layer in the present embodiment.
Enlarge and diffuse the case 9 outer spray equipments 27 that also are provided with.Spray irrigation device 27 comprises coolant inlet pipe 27-1, and coolant inlet pipe 27-1 connects water jet standpipe 27-2, offers spray apertures 27-3 on the water jet standpipe 27-2 or connects shower nozzle, and selected shower nozzle can be atomizer (not establishing in the present embodiment).The heating arrangement 28 that also has jet pipe that together is provided with spray equipment 27.Heating arrangement 28 comprises steam inlet duct 23, and steam inlet duct 23 connects heating pipe 28-1, and heating pipe 28-1 connects steam return water pipe 15; Be connected heat-conducting plate 28-3 between heating pipe 28-1 and the water jet standpipe 27-2.Heating pipe 28-1 and water jet standpipe 27-2 are outer can to wrap up adiabator layer 28-3, reserves the spray apertures 27-3 ejection aperture on the water jet standpipe 27-2 on the adiabator layer 28-3 or exposes shower nozzle, as shown in Figure 7.
The ash discharge section of vertical ash discharging gear 8 and/or expansion are diffused and are established vertical defeated material scraping mechanism 29 in the case.The ash discharge section of vertical ash discharging gear 8 and expansion are diffused and are established rotating shaft 29-1 in the case 9 in the present embodiment, and rotating shaft 29-1 connects with actuating device 29-2, and rotating shaft 29-1 goes up connecting bolt conveying blade 29-3.On the top of vertical ash discharging gear 8, the ash discharge section can be established material scraping plate 29-4 with the cylindrical shape ash hole section 9-1 place that case 9 is diffused in expansion.
The treating process of this method is: after powder is transported to vertical ash discharging gear 8 through feeding device 5, when the ash discharge section of the vertical ash discharging gear 8 of process, through the spray of spray equipment 10; Make most of powder humidifications, under the effect through vertical defeated material scraping mechanism 29, fall into to enlarge and diffuse case 9; Diffuse case 9 in expansion and produce airborne dust; Under the effect of the spray equipment 11 of the dust of kicking up in case 9 is diffused in expansion, obtain moistening fully, again through vertical defeated material scraping mechanism 29 outputs; For the drop of the dust avoiding exporting produces airborne dust, utilize to enlarge and diffuse case 9 outer spray equipments 27 and press dirt.If the powder amount of processing is bigger, 25 pairs of powder dust of spray irrigation device humidification of establishing in the case 9 dust inlet section 9-1 is diffused in expansion also capable of using.Realize multistage humidification like this, but the water consumption achieve effective control.
In addition, spray equipment and heating arrangement are provided with jointly, have solved in north of china in winter drenching system easy freezing blocking problem.Promptly after drenching system is freezed to stop up; Utilize heating arrangement will and fusing (heat that promptly utilizes the steam heating piping heats the shower of drenching system); Or utilize thermal current that drenching system is blown logical back (being the pipeline that thermal current can get into drenching system), carry out operation again.
Said structure is used for powder loading machine, and forming multi-stage spray humidification-type powder dust-free loader can have numerous embodiments, wherein a kind of below in conjunction with Fig. 1 explanation.
As shown in Figure 1, it is one and has three-dimensional rotating multi-stage spray humidification-type powder dustless loading method and powder dust-free loader.Dust collector ash hopper 1 is located on the support 30, the unloading valve 2 under the dust collector ash hopper 1 with advance apparatus for ash 3 and be connected.Feed arrangement comprises main feed auger 3-2, can connect subsequent use ash-discharging device (not shown) on the main feed auger 3-2.Main feed auger 3-2 through blanking short tube 4 with can do three-dimensional rotating feeding device 5 and be communicated with.Three-dimensional rotating feeding device 5 one ends and hinged-support 6 are hinged, and the other end is connected with vertical swing type mechanism 7.Vertical swing type mechanism 7 is a pivot-lift mechanism, and hinged-support 6 is described in detail at ZL02115559.3 with the structure of vertical swing type mechanism 7, this not tired stating.Also can not adopt unloading valve according to process condition.
The powder ash conveying device is located on the bearing, and its bearing can also be able to be done two-dimentional rotating hinged-support, and hinged-support is located at support, and promptly the powder ash conveying device is only done plane rotation, this not tired stating.
The powder ash conveying device is located on the bearing, its bearing or fixed bearing.The structure of bearing or hinged-support is in the existing use of existing powder dust-free loader.
The all technical characteristic that has comprised above-mentioned damping device in the above-mentioned structure with three-dimensional rotating multi-stage spray humidification-type powder dustless loading promptly is that a kind of humidifying multi-stage spraying powdery device is applied in the powder dustless loading and uses.That is to say the powder dustless loading structure in have the structure of damping device.
Can on feed arrangement, establish decompression and dosing valve such as star-like unloading valve etc. according to process condition.
Claims (11)
1. spray powder humidifier; It comprises the powder ash conveying device, it is characterized in that said powder ash conveying device comprises vertical defeated ash section at least, establishes in the vertical defeated ash section vertically to scrape material and mix conveying mechanism; Establish the spray damping device in the vertical defeated ash section; Case was diffused in the expansion of airborne dust in the terminal connection of said vertical defeated ash section can produce, and it is to let the powder of ash discharge section output of vertical defeated ash of the powder ash conveying device funnel type casing of kicking up that case is diffused in said expansion, and funnel type casing hypomere is the ash hole section; Funnel type casing epimere is for enlarging the linkage section of shape, and linkage section is connected with vertical ash discharging gear ash discharge section; Funnel type casing epimere is connected by transition phase with funnel type casing hypomere; Enlarge to diffuse and establish second stage damping device in the case, said damping device comprises coolant inlet pipe, and coolant inlet pipe connects water jet standpipe, offers spray apertures on the water jet standpipe or connects shower nozzle; Said expansion is diffused in the case ash hole section and is provided with the spray irrigation device, and said spray irrigation device comprises coolant inlet pipe, and coolant inlet pipe connects water jet standpipe, offers spray apertures on the water jet standpipe or connects shower nozzle.
2. spray powder humidifier according to claim 1 is characterized in that the said material of vertically scraping mixes mechanism and comprises drive motor, and the rotating shaft of drive motor bonded assembly connects in the rotating shaft and scrapes material and mix defeated material blade and/or scraper plate.
3. spray powder humidifier according to claim 1 is characterized in that said expansion diffuses case and also be provided with spray equipment outward, and said spray equipment comprises coolant inlet pipe, and coolant inlet pipe connects water jet standpipe, offers spray apertures on the water jet standpipe or connects shower nozzle.
4. spray powder humidifier according to claim 1 is characterized in that the heating arrangement that also has water jet standpipe that said damping device together is provided with.
5. like the said spray powder humidifier of claim 4, it is characterized in that said heating arrangement comprises steam inlet duct, steam inlet duct connects heating pipe, and heating pipe connects the steam return water pipe; Be connected heat-conducting plate between heating pipe and the water jet standpipe.
6. like the said spray powder humidifier of claim 3, it is characterized in that the heating arrangement that also has water jet standpipe that said damping device together is provided with.
7. like the said spray powder humidifier of claim 6, it is characterized in that said heating arrangement comprises steam inlet duct, steam inlet duct connects heating pipe, and heating pipe connects the steam return water pipe; Be connected heat-conducting plate between heating pipe and the water jet standpipe.
8. powder dust-free loader based on claim 1 or 2 described spray powder humidifications; It is characterized in that said powder ash conveying device is connected UNICOM with feed arrangement; The powder ash conveying device is made up of vertical defeated grey ash discharge section or is made up of vertical defeated grey ash discharge section and the defeated ash section of level; The powder ash conveying device is located on the bearing or is located on the support, and said bearing is a kind of in following: fixed bearing maybe can be done two-dimentional rotating hinged-support or three-dimensional rotating hinged-support.
9. the powder dust-free loader based on the spray powder humidification as claimed in claim 8 is characterized in that said bearing is to do three-dimensional rotating hinged-support, and hinged-support is located at support, and the powder ash conveying device is connected with vertical swing type mechanism.
10. the powder dust-free loader based on the spray powder humidification as claimed in claim 8 is characterized in that establishing on the said feed arrangement decompression and dosing valve.
11. the powder dust-free loader based on the spray powder humidification as claimed in claim 8 is characterized in that powder ash conveying device bonded assembly enlarges to diffuse case and also be provided with spray equipment outward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100517535A CN101074072B (en) | 2007-03-29 | 2007-03-29 | Spray powder humidifier and powder dust-free loader based on spray powder humidification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100517535A CN101074072B (en) | 2007-03-29 | 2007-03-29 | Spray powder humidifier and powder dust-free loader based on spray powder humidification |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101074072A CN101074072A (en) | 2007-11-21 |
| CN101074072B true CN101074072B (en) | 2012-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2007100517535A Expired - Fee Related CN101074072B (en) | 2007-03-29 | 2007-03-29 | Spray powder humidifier and powder dust-free loader based on spray powder humidification |
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| CN (1) | CN101074072B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101898692B (en) * | 2010-08-26 | 2012-04-18 | 中冶赛迪工程技术股份有限公司 | Environmental-friendly dust suppression dump vehicle |
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|---|---|---|---|---|
| GB2053708A (en) * | 1979-07-03 | 1981-02-11 | Koeppern & Co Kg Maschf | Apparatus for the damping of bulk material |
| US4760856A (en) * | 1984-04-12 | 1988-08-02 | Fuller Company | Method and apparatus for conditioning fly ash |
| CN2300629Y (en) * | 1997-03-21 | 1998-12-16 | 胡志强 | Humidifier for fine dust |
| CN2307766Y (en) * | 1997-04-25 | 1999-02-17 | 李玉清 | Dust discharging humidification machine |
| CN2332692Y (en) * | 1998-05-05 | 1999-08-11 | 石家庄市新大地环保技术研究所 | Humidifying ash discharging machine |
| CN2604416Y (en) * | 2002-09-05 | 2004-02-25 | 杜国弟 | Air-flow buffer humidifying dust removing coal conduit during coal transportation |
| CN2613463Y (en) * | 2003-04-22 | 2004-04-28 | 欧阳汉峰 | Dust free two-purpose dry/wet powder material loading machine |
-
2007
- 2007-03-29 CN CN2007100517535A patent/CN101074072B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2053708A (en) * | 1979-07-03 | 1981-02-11 | Koeppern & Co Kg Maschf | Apparatus for the damping of bulk material |
| US4760856A (en) * | 1984-04-12 | 1988-08-02 | Fuller Company | Method and apparatus for conditioning fly ash |
| CN2300629Y (en) * | 1997-03-21 | 1998-12-16 | 胡志强 | Humidifier for fine dust |
| CN2307766Y (en) * | 1997-04-25 | 1999-02-17 | 李玉清 | Dust discharging humidification machine |
| CN2332692Y (en) * | 1998-05-05 | 1999-08-11 | 石家庄市新大地环保技术研究所 | Humidifying ash discharging machine |
| CN2604416Y (en) * | 2002-09-05 | 2004-02-25 | 杜国弟 | Air-flow buffer humidifying dust removing coal conduit during coal transportation |
| CN2613463Y (en) * | 2003-04-22 | 2004-04-28 | 欧阳汉峰 | Dust free two-purpose dry/wet powder material loading machine |
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| CN101074072A (en) | 2007-11-21 |
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Granted publication date: 20120321 |