CN217015801U - Urea prilling tower dust disposal equipment based on low resistance - Google Patents
Urea prilling tower dust disposal equipment based on low resistance Download PDFInfo
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- CN217015801U CN217015801U CN202220777507.8U CN202220777507U CN217015801U CN 217015801 U CN217015801 U CN 217015801U CN 202220777507 U CN202220777507 U CN 202220777507U CN 217015801 U CN217015801 U CN 217015801U
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- dust removal
- dust
- tower body
- removal tower
- filter screen
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- 239000000428 dust Substances 0.000 title claims abstract description 119
- 239000004202 carbamide Substances 0.000 title claims abstract description 21
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 238000004140 cleaning Methods 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims description 6
- 230000006978 adaptation Effects 0.000 claims description 2
- 238000007790 scraping Methods 0.000 abstract description 21
- 230000000694 effects Effects 0.000 abstract description 9
- 238000005469 granulation Methods 0.000 abstract description 7
- 230000003179 granulation Effects 0.000 abstract description 7
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 150000003672 ureas Chemical class 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 12
- 238000001914 filtration Methods 0.000 description 8
- 239000002699 waste material Substances 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000003993 interaction Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 235000021120 animal protein Nutrition 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000000618 nitrogen fertilizer Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000022558 protein metabolic process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Images
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- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The utility model discloses urea granulation tower dust treatment equipment based on low resistance, which comprises a dust removal tower body, a driving device, a filter screen and a flow slowing device, wherein the driving device is arranged at the central position inside the dust removal tower body, the filter screen is arranged inside the dust removal tower body, the flow slowing device is arranged inside the dust removal tower body and close to the filter screen, a cleaning device is arranged at the bottom of the surface of a rotating shaft and close to the filter screen, the bottom of a scraping plate is fixedly connected with the top end of an arc-shaped connecting piece, a hairbrush is arranged at the top of the surface of the scraping plate, and a wiping rod is arranged on the surface of the scraping plate and close to the hairbrush. This urea prilling tower dust disposal equipment based on low resistance has reached the effect from the clearance, can in time filter the recovery to the dust, reduces the wasting of resources to help the environmental protection, can carry out the self-cleaning simultaneously, the difficult condition that blocks up that appears, safe and reliable has improved work efficiency and performance.
Description
Technical Field
The utility model relates to the technical field of dust treatment, in particular to urea prilling tower dust treatment equipment based on low resistance.
Background
Urea is an organic compound consisting of carbon, nitrogen, oxygen and hydrogen, is a product after animal protein metabolism, is usually used as a nitrogenous fertilizer for fabrics, and is basically presented on the market in the form of granules.
At present, can produce the dust during current urea granulation production to along with air current discharge, a large amount of dust of exhaust has not only caused the waste of resource, bestows upon pollution to the environment atmosphere simultaneously, and some only filter through the filter screen, nevertheless use the back for a long time, can receive the glutinous of dust and glue, cause the filter screen jam, and the influence needs artifical regular clearance, wastes time and energy, and work efficiency is low, has reduced performance to the filtration of dust.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problems, the utility model provides urea granulation tower dust treatment equipment based on low resistance, which solves the problems that dust is generated during the existing urea granulation production, and is discharged along with air flow, a large amount of discharged dust not only causes resource waste, but also pollutes the environment atmosphere, some of the equipment only filters through a filter screen, but also is stuck by the dust after being used for a long time, causes filter screen blockage, influences the dust filtration, needs manual regular cleaning, wastes time and labor, has low working efficiency and reduces the use performance.
In order to realize the purpose, the utility model is realized by the following technical scheme: a urea granulation tower dust treatment device based on low resistance comprises a dust removal tower body, a driving device, a filter screen and a current slowing device, wherein the driving device is arranged at the central position inside the dust removal tower body;
the dust removal tower comprises a dust removal tower body, a driving device and a dust removal device, wherein the driving device is provided with a rotating shaft, cambered surface blades and a cleaning device, the rotating shaft is rotatably connected to the central position in the dust removal tower body through a support, the cambered surface blades are arranged at the top of the rotating shaft, and the cleaning device is arranged at the bottom of the surface of the rotating shaft and is close to a filter screen;
the cleaning device is provided with an arc-shaped connecting piece, a scraping plate, a brush and a wiping rod, the bottom end of the arc-shaped connecting piece is fixedly connected with the bottom end of the rotating shaft, the bottom end of the scraping plate is fixedly connected with the top end of the arc-shaped connecting piece, the brush is arranged at the top position of the surface of the scraping plate, the wiping rod is arranged on the surface of the scraping plate and close to the brush, when the rotating shaft drives the cleaning device, the rotating scraping plate can timely scrape off the dust filtered from the bottom of the filter screen, the brush and the wiping rod can also rotate along with the scraping plate, the rotating brush can timely wipe off the dust remained after scraping, so that the dust falls off, meanwhile, the rotating wiping rod can timely wipe off the bottom of the filter screen, the filter screen can be effectively cleaned automatically, the sticky condition is reduced, the blockage is not easy to occur, and the dust is beneficial to being rapidly filtered, by utilizing the mutual connection and interaction between the structures, multiple functions are realized, the safety and the reliability are realized, and the service performance is improved.
Preferably, one side of the inner wall of the dust removal tower body is fixedly connected with a power mechanism, the output end of the power mechanism is connected with the rotating shaft, and the top of the dust removal tower body is provided with a top cap.
Preferably, the supporting legs are arranged at the edge of the surface of the dust removal tower body, one side of the bottom of the surface of the dust removal tower body is communicated with an air inlet pipe, a discharge port is arranged at the central position of the bottom of the dust removal tower body, when gas enters the dust removal tower body from the air inlet pipe, the rotating shaft is driven by a power mechanism, so that the cambered surface blades and the cleaning device rotate all the way, at the moment, the rotating cambered surface blades blow air in the dust removal tower body, so that the gas carrying dust rises, the dust is filtered in time by the filter screen, the dust filtered by the filter screen is cleaned by the rotating cleaning device, the blockage is not easy to occur, the air flowing speed is reduced by the slow flow device, the dust is further filtered, the whole device can filter and recycle the dust in time, the resource waste is reduced, and the environmental protection is facilitated, meanwhile, the automatic cleaning device can be cleaned automatically, is not easy to block, is safe and reliable, and improves the working efficiency and the service performance.
Preferably, the surface of the scraper blade is set to be arc-shaped, and the material of the wiping rod is set to be high-density sponge material.
Preferably, the slow flow device is provided with a slow flow cover, a herringbone flow guide plate and air holes, the surface edge of the slow flow cover is fixedly connected with the inner wall of the dust removal tower body, the surface of the rotating shaft is rotatably connected with the slow flow cover, the surface of the herringbone flow guide plate is fixedly connected with the bottom of the slow flow cover, the air holes are formed in the surface of the slow flow cover, when the air flow rises due to blowing of cambered blades in rotation, the slow flow cover blocks the air flow at the moment, the flowing speed of the air flow is reduced, the air flow smoothly passes through the air holes under the flow guiding effect of the herringbone flow guide plate, the air flow cannot stop, the speed of the air flow is ensured, the gas flow velocity is prevented from being too high, the slow flow effect is realized, the filter screen is favorable for fully filtering dust, the air flow is fully utilized, the ingenious structure is linked together, safety and reliability are realized by multiple functions, the service performance is improved.
Preferably, the inner wall of slow flow cover sets up to the arc, the rotation hole with pivot surface looks adaptation is seted up to the central point that slowly flows the cover, bleeder vent evenly distributed is on the surface of slow flow cover.
The utility model provides urea prilling tower dust treatment equipment based on low resistance. The method has the following beneficial effects:
the urea granulation tower dust treatment equipment based on low resistance comprises a dust removal tower body, a driving device, a filter screen, a slow flow device, a power mechanism, a top cap, supporting legs, an air inlet pipe, a discharge port, a rotating shaft, cambered surface blades and a cleaning device, wherein when gas enters the dust removal tower body from the air inlet pipe, the rotating shaft is driven by the power mechanism, so that the cambered surface blades and the cleaning device rotate all the time, the rotating cambered surface blades blow air in the dust removal tower body to enable the gas to lift dust, the dust is filtered in time by the filter screen, the dust filtered by the filter screen is cleaned by the cleaning device in rotation, the blockage situation is not easy to occur, the air flow speed is reduced by the slow flow device, the dust is further filtered, and the whole device can timely filter and recover the dust, the waste of resources is reduced, the environment is protected, self-cleaning can be carried out, the blockage situation is not easy to occur, safety and reliability are realized, and the working efficiency and the service performance are improved.
(two), this urea prilling tower dust disposal equipment based on low resistance, through the arc connecting piece, the scraper blade, the brush, clean the stick, when the pivot drives cleaning device, scraper blade in the rotation this moment in time strikes off the dust that filter screen bottom filtered off, and the brush, clean the stick and also can rotate along with the scraper blade together, brush in the rotation this moment is removed scraping remaining dust after striking off, make the dust drop, clean the stick in the rotation simultaneously in time and clean the filter screen bottom, can effectively carry out self-cleaning to the filter screen, reduce the sticky condition of appearing, the difficult jam that appears, help filtering the dust fast, utilize the interconnection between the structure, and interaction, multiple functions have been realized, safety and reliability, usability has been improved.
(III), this urea prilling tower dust treatment equipment based on low resistance, through slowly flowing the cover, the chevron shape guide plate, the bleeder vent, when the cambered surface blade of air current in the rotation blows when rising, slowly flowing the cover and blockking of air current this moment, the flow velocity of air current has been reduced, and under the water conservancy diversion effect of chevron shape guide plate, make the air current smoothly pass from the bleeder vent, and then make the air current can not stop, the speed of air current has both been guaranteed, it is too fast to have the gas flow rate of preventing, the effect of slowly flowing has been realized, help the filter screen to carry out abundant filtration to the dust, the make full use of air current, ingenious structural connection is in the same place, safety and reliability, multiple functions have been realized, service performance has been improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the internal structure of the present invention;
FIG. 3 is a schematic structural diagram of a driving device according to the present invention;
FIG. 4 is a schematic view of the cleaning apparatus of the present invention;
FIG. 5 is a schematic structural diagram of a flow slowing device according to the present invention.
In the figure: the device comprises a dust removal tower body 1, a driving device 2, a filter screen 3, a slow flow device 4, a power mechanism 5, a top cap 6, a supporting leg 7, an air inlet pipe 8, a discharge hole 9, a rotating shaft 21, a cambered blade 22, a cleaning device 23, an arc-shaped connecting piece 231, a scraping plate 232, a brush 233, a wiping rod 234, a slow flow cover 41, a herringbone guide plate 42 and air holes 43.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the specification of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution: a urea granulation tower dust treatment device based on low resistance comprises a dust removal tower body 1, a driving device 2, a filter screen 3 and a flow slowing device 4, wherein the driving device 2 is arranged at the central position inside the dust removal tower body 1, the filter screen 3 is arranged inside the dust removal tower body 1, and the flow slowing device 4 is arranged inside the dust removal tower body 1 and close to the filter screen 3;
the driving device 2 is provided with a rotating shaft 21, cambered blades 22 and a cleaning device 23, the rotating shaft 21 is rotatably connected to the central position inside the dust removal tower body 1 through a support, the cambered blades 22 are arranged at the top of the rotating shaft 21, and the cleaning device 23 is arranged at the bottom of the surface of the rotating shaft 21 and close to the filter screen 3;
the cleaning device 23 is provided with an arc-shaped connecting piece 231, a scraping plate 232, a brush 233 and a wiping rod 234, the bottom end of the arc-shaped connecting piece 231 is fixedly connected with the bottom of the surface of the rotating shaft 21, the bottom of the scraping plate 232 is fixedly connected with the top end of the arc-shaped connecting piece 231, the brush 233 is arranged at the top of the surface of the scraping plate 232, the wiping rod 234 is arranged on the surface of the scraping plate 232 and close to the brush 233, when the rotating shaft 21 drives the cleaning device 23, the rotating scraping plate 232 timely scrapes off dust filtered from the bottom of the filter screen 3, the brush 233 and the wiping rod 234 also rotate along with the scraping plate 232, the rotating brush 233 brushes off residual dust after scraping off, so that the dust falls off, and meanwhile, the rotating wiping rod 234 timely wipes off the bottom of the filter screen 3, thereby effectively cleaning the filter screen 3, reducing sticky conditions and preventing blockage, the dust filter is beneficial to rapidly filtering dust, multiple functions are realized by utilizing the mutual connection and interaction between the structures, the dust filter is safe and reliable, and the service performance is improved.
One side of the inner wall of the dust removal tower body 1 is fixedly connected with a power mechanism 5, the output end of the power mechanism 5 is connected with a rotating shaft 21, and the top of the dust removal tower body 1 is provided with a top cap 6.
The edge of the surface of the dust removal tower body 1 is provided with a supporting leg 7, one side of the bottom of the surface of the dust removal tower body 1 is communicated with an air inlet pipe 8, the central position of the bottom of the dust removal tower body 1 is provided with a discharge port 9, when gas enters the dust removal tower body 1 from the air inlet pipe 8 and is driven by a power mechanism 5 to drive a rotating shaft 21, so that cambered blades 22 and a cleaning device 23 rotate all the time, at the moment, the rotating cambered blades 22 blow the air in the dust removal tower body 1, the gas carrying dust rises, the dust is filtered in time through a filter screen 3, the dust filtered by the filter screen 3 is cleaned by the rotating cleaning device 23, the blockage situation is not easy to occur, the air flowing speed is reduced by a slow flow device 4, the dust is further favorably filtered, the whole device can timely filter and recover the dust, and reduce the resource waste, the cleaning device is beneficial to environmental protection, can be self-cleaned, is not easy to block, is safe and reliable, and improves the working efficiency and the service performance.
The surface of the scraping plate 232 is set to be arc-shaped, and the material of the wiping rod 234 is set to be high-density sponge material.
The slow flow device 4 is provided with a slow flow cover 41, a herringbone guide plate 42 and air holes 43, the surface edge of the slow flow cover 41 is fixedly connected with the inner wall of the dust removal tower body 1, the surface of the rotating shaft 21 is rotatably connected with the slow flow cover 41, the surface of the herringbone guide plate 42 is fixedly connected with the bottom of the slow flow cover 41, the air holes 43 are formed in the surface of the slow flow cover 41, when air flow blows and rises on the rotating cambered surface blade 22, the slow flow cover 41 blocks the air flow at the moment, the flowing speed of the air flow is reduced, the air flow smoothly passes through the air holes 43 under the flow guiding effect of the herringbone guide plate 42, and then the air flow cannot stop, so that the speed of the air flow is ensured, the air flow velocity is prevented from being too high, the slow flow effect is realized, the dust is favorably and fully filtered by the filter screen 3, the air flow is fully utilized, the ingenious structures are linked together, safety and reliability are realized, realizes multiple functions and improves the service performance.
The inner wall of the slow flow cover 41 is arc-shaped, the central position of the slow flow cover 41 is provided with a rotating hole matched with the surface of the rotating shaft 21, and the air holes 43 are uniformly distributed on the surface of the slow flow cover 41.
When the dust removal device is used, the whole device is arranged at a specified position, when gas enters the dust removal tower body 1 from the gas inlet pipe 8, the rotating shaft 21 is driven by the power mechanism 5, the cambered surface blade 22 and the cleaning device 23 all rotate, the rotating cambered surface blade 22 blows air in the dust removal tower body 1, so that the gas carries dust, the dust is filtered by the filter screen 3 in time, when the rotating shaft 21 drives the cleaning device 23, the rotating scraper 232 scrapes the dust filtered from the bottom of the filter screen 3 in time, the brush 233 and the wiping rod 234 also rotate along with the scraper 232, the rotating brush 233 brushes the dust remained after scraping, so that the dust falls, and meanwhile, the rotating wiping rod 234 wipes the bottom of the filter screen 3 in time, so that the filter screen 3 can be cleaned automatically and effectively, reduce the sticky condition of appearing, be difficult for appearing blockking up, help filtering the dust fast, and when the air current blows the rise at cambered surface blade 22 in the rotation, the slow flow cover 41 stops of air current this moment, the flow velocity of air current has been reduced, and under the water conservancy diversion effect of chevron shape guide plate 42, make the air current smoothly pass from bleeder vent 43, and then make the air current can not stop, the speed of air current has both been guaranteed, it is too fast to have the gas flow velocity of preventing, the effect of slow flow has been realized, help filter screen 3 to carry out abundant filtration to the dust, make full use of air current, ingenious structural connection is in the same place, safety and reliability, multiple functions have been realized, service performance has been improved.
It is to be understood that the described embodiments are merely a few embodiments of the utility model, and not all embodiments. All other embodiments, which can be derived by one of ordinary skill in this and related arts based on the embodiments of the present invention without creative efforts, shall fall within the protection scope of the present invention. Structures, devices, and methods of operation not specifically described or illustrated herein are generally practiced in the art without specific recitation or limitation.
Claims (6)
1. The utility model provides a urea prilling tower dust disposal equipment based on low resistance, includes dust removal tower body (1), drive arrangement (2), filter screen (3), unhurried current device (4), its characterized in that: the driving device (2) is arranged at the central position inside the dust removal tower body (1), the filter screen (3) is arranged inside the dust removal tower body (1), and the slow flow device (4) is arranged inside the dust removal tower body (1) and close to the filter screen (3);
the dust removal tower is characterized in that the driving device (2) is provided with a rotating shaft (21), cambered surface blades (22) and a cleaning device (23), the rotating shaft (21) is rotatably connected to the central position inside the dust removal tower body (1) through a support, the cambered surface blades (22) are arranged at the top of the rotating shaft (21), and the cleaning device (23) is arranged at the bottom of the surface of the rotating shaft (21) and close to the filter screen (3);
cleaning device (23) are equipped with arc connecting piece (231), scraper blade (232), brush (233), wiping rod (234), the bottom of arc connecting piece (231) and the surperficial bottom fixed connection of pivot (21), the bottom of scraper blade (232) and the top fixed connection of arc connecting piece (231), brush (233) set up the surperficial top position at scraper blade (232), wiping rod (234) set up the surface at scraper blade (232) and be close to the position of brush (233).
2. The low resistance based urea prilling tower dust handling equipment according to claim 1, wherein: the dust removal tower comprises a dust removal tower body (1), wherein a power mechanism (5) is fixedly connected to one side of the inner wall of the dust removal tower body (1), the output end of the power mechanism (5) is connected with a rotating shaft (21), and a top cap (6) is arranged at the top of the dust removal tower body (1).
3. The low-resistance urea prilling tower dust treatment equipment according to claim 1, wherein: the dust removal tower body (1) is provided with supporting legs (7) at the surface edge, the surface bottom one side intercommunication of dust removal tower body (1) has intake pipe (8), the bottom central point of dust removal tower body (1) puts and is provided with discharge gate (9).
4. The low resistance based urea prilling tower dust handling equipment according to claim 1, wherein: the surface of the scraper (232) is arc-shaped, and the material of the wiping rod (234) is high-density sponge material.
5. The low resistance based urea prilling tower dust handling equipment according to claim 1, wherein: unhurried current device (4) are equipped with unhurried current cover (41), chevron shape guide plate (42), bleeder vent (43), the surface edge of unhurried current cover (41) and the inner wall fixed connection of dust removal tower body (1), the surface of pivot (21) rotates between cover (41) with unhurried current and is connected, the surface of chevron shape guide plate (42) and the bottom fixed connection who slowly flows cover (41), the surface that slowly flows cover (41) is seted up in bleeder vent (43).
6. The low-resistance urea prilling tower dust treatment equipment according to claim 5, wherein: the inner wall of slow flow cover (41) sets up to the arc, the central point of slow flow cover (41) puts and offers the rotation hole with pivot (21) surface looks adaptation, bleeder vent (43) evenly distributed is on the surface of slow flow cover (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220777507.8U CN217015801U (en) | 2022-04-06 | 2022-04-06 | Urea prilling tower dust disposal equipment based on low resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220777507.8U CN217015801U (en) | 2022-04-06 | 2022-04-06 | Urea prilling tower dust disposal equipment based on low resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217015801U true CN217015801U (en) | 2022-07-22 |
Family
ID=82415052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220777507.8U Active CN217015801U (en) | 2022-04-06 | 2022-04-06 | Urea prilling tower dust disposal equipment based on low resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217015801U (en) |
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2022
- 2022-04-06 CN CN202220777507.8U patent/CN217015801U/en active Active
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Address after: 710065 room 31102, unit 3, building 1, oak constellation, north of Keji fifth road, high tech Zone, Xi'an, Shaanxi Province Patentee after: Shaanxi Compliance Energy Conservation Co.,Ltd. Address before: 710065 room 31102, unit 3, building 1, oak constellation, north of Keji fifth road, high tech Zone, Xi'an, Shaanxi Province Patentee before: Shaanxi Kechuang Energy Technology Co.,Ltd. |
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| TR01 | Transfer of patent right |
Effective date of registration: 20240624 Address after: 719000 Huangfuchuan Industrial Park, Huangfu Town, Fugu County, Yulin City, Shaanxi Province Patentee after: Fugu Science and Technology Innovation Source Energy Technology Co.,Ltd. Country or region after: China Address before: 710065 room 31102, unit 3, building 1, oak constellation, north of Keji fifth road, high tech Zone, Xi'an, Shaanxi Province Patentee before: Shaanxi Compliance Energy Conservation Co.,Ltd. Country or region before: China |