CN208413878U - It is a kind of for recycling the device of tin indium oxide in discarded colored filter - Google Patents
It is a kind of for recycling the device of tin indium oxide in discarded colored filter Download PDFInfo
- Publication number
- CN208413878U CN208413878U CN201821106884.9U CN201821106884U CN208413878U CN 208413878 U CN208413878 U CN 208413878U CN 201821106884 U CN201821106884 U CN 201821106884U CN 208413878 U CN208413878 U CN 208413878U
- Authority
- CN
- China
- Prior art keywords
- indium oxide
- colored filter
- tin indium
- collector unit
- product collector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- MRNHPUHPBOKKQT-UHFFFAOYSA-N indium;tin;hydrate Chemical compound O.[In].[Sn] MRNHPUHPBOKKQT-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 238000004064 recycling Methods 0.000 title claims abstract description 14
- 238000005485 electric heating Methods 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 239000011521 glass Substances 0.000 claims abstract description 13
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000002245 particle Substances 0.000 claims abstract description 7
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 5
- 239000000428 dust Substances 0.000 claims description 37
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 17
- 229910052799 carbon Inorganic materials 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000011449 brick Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- GRPQBOKWXNIQMF-UHFFFAOYSA-N indium(3+) oxygen(2-) tin(4+) Chemical compound [Sn+4].[O-2].[In+3] GRPQBOKWXNIQMF-UHFFFAOYSA-N 0.000 claims 1
- 229920002120 photoresistant polymer Polymers 0.000 claims 1
- 239000003610 charcoal Substances 0.000 abstract description 3
- 239000000047 product Substances 0.000 description 18
- 239000007789 gas Substances 0.000 description 15
- 238000000034 method Methods 0.000 description 10
- 229910052738 indium Inorganic materials 0.000 description 6
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 6
- 238000011084 recovery Methods 0.000 description 6
- 239000007921 spray Substances 0.000 description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 5
- 239000004973 liquid crystal related substance Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000007664 blowing Methods 0.000 description 4
- RHZWSUVWRRXEJF-UHFFFAOYSA-N indium tin Chemical compound [In].[Sn] RHZWSUVWRRXEJF-UHFFFAOYSA-N 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- 239000010408 film Substances 0.000 description 3
- 238000000053 physical method Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910003437 indium oxide Inorganic materials 0.000 description 2
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229920001429 chelating resin Polymers 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
The utility model discloses a kind of for recycling the device of tin indium oxide in discarded colored filter, including shell, support frame, conveyer belt, thermal chamber and product collector unit, the shell is supported by support frame, it is tightly connected in shell with product collector unit, thermal chamber is equipped in shell, conveyer belt is located at the lower section of thermal chamber and product collector unit, thermal chamber includes electric heating area and pulse jet area, it wherein discards the electric heating area that faces up into that colored filter contains tin indium oxide and carries out fully oxidized decomposition, after entering pulse jet area after oxygenolysis, tin indium oxide is blown off from glass surface by compressed air and is fallen off, hot-air containing indium tin oxide particles enters product collector unit and is collected, it is discharged after exhaust gas charcoal treated by the air-introduced machine of product collector unit.The utility model can realize the high efficiente callback of tin indium oxide in discarded colored filter, avoid pollution of the exhaust gas generated in high-temperature heating process to environment.
Description
Technical field
It is specifically a kind of the utility model relates to discard liquid crystal display panel valuable component utilization technology field
For recycling the device of tin indium oxide in discarded colored filter.
Background technique
The big volume production of colored filter defect ware in discarded computer liquid-crystal display, mobile phone and liquid crystal display panel production process
It is raw, keep the quantity of discarded colored filter more and more.Discarded colorized optical filtering on piece contains indium tin oxide films, wherein containing indium
Important metallic element not only can cause environmental pollution if do not recycled to it with tin etc., but will cause metal resource
Serious waste.Since the demand of liquid crystal display panel increases year by year, the consumption of tin indium oxide will also increase year by year, this to indium and
The production of tin brings severe stress, is such as effectively recycled to the tin indium oxide in discarded colored filter, can greatly alleviate
The production pressure of indium metal and tin.
Currently, the recycling of tin indium oxide is broadly divided into chemical method and physical method, chemical method in discarded colored filter
Mainly include wet-leaching, chelating resin extraction, high temperature reduction and chlorination recycling etc., physical method mainly include mechanical grinding,
Grind flotation etc..Wherein, reaction is the advantages of chemical method thoroughly and the higher indium metal of purity or indium can be directly obtained
Other compounds, but the generally existing complex technical process of these methods, higher cost, and it is easy to produce secondary pollution problems.
And tin indium oxide is recycled using physical method, though pure indium metal and its compound cannot be obtained, available oxidation
Indium tin is enriched with body, can effectively reduce cost recovery and reduces secondary pollution risk, creates favorable conditions for subsequent purification refining.
Currently, physical recovering method, which discards tin indium oxide in colored filter, has achieved marked improvement, but recovery efficiency begins
Eventually it is not high so that remained on the glass panel of tin indium oxide after treatment it is more, if can be by the oxygen in discarded colored filter
Change indium tin thin film and be integrally detached from glass panel substrate, to the recovery efficiency for improving tin indium oxide, improves discarded liquid crystal display panel
Comprehensive recovery is significant.
The utility model is intended to according to the structure feature for discarding colored filter, to the indium oxide in discarded colored filter
Tin thin film carries out being heat-treated laggard horizontal high voltage air blown, and then obtains the purpose of tin indium oxide enrichment body, to improve oxidation
The recovery efficiency of indium tin.
Utility model content
In view of this, the utility model be directed to the prior art exist deficiency, main purpose be to provide one kind be used for back
The device of tin indium oxide in discarded colored filter is received, the tin indium oxide in discarded colored filter can be carried out high
Effect recycling.
To achieve the above object, the utility model is using following technical solution:
It is a kind of for recycling the device of tin indium oxide in discarded colored filter, including shell, support frame, conveyer belt, heat
Process chamber and product collector unit, the shell are supported by support frame, and shell and product collector unit are tightly connected,
Thermal chamber is equipped in shell, conveyer belt is located at the lower section of thermal chamber and product collector unit, and the thermal chamber includes
Electric heating area and pulse jet area, wherein discarded colored filter contains the electricity of tin indium oxide faced up into thermal chamber
Heating zone makes the fully oxidized decomposition of the color light resistance layer between tin indium oxide and glass, color light resistance layer oxidation point by heating
After discarded colored filter after solution enters pulse jet area, by the compressed air in pulse jet area by tin indium oxide from glass
Surface, which is blown off, to fall off, and the hot-air containing indium tin oxide particles enters product collector unit and is collected, and exhaust gas is received by product
Collect the air-introduced machine discharge of unit.
Preferred: the conveyer belt is made of 304 stainless (steel) wire bands, can tolerate 500 DEG C to 800 DEG C high temperature.
Preferred: the resistance heating module that the electric heating area is made of electric furnace heating wire and refractory brick forms, electric heating area
Temperature detected by the thermocouple being equipped in shell, and temperature is adjusted as needed.
Preferred: the product collector unit includes dust gathering arrester, condenser, dust arrester, active carbon case and air-introduced machine, collection
Dust hood is connected by pipeline with condenser, and condenser is connected with dust arrester, and dust arrester is connected with active carbon case, active carbon case with draw
Blower is connected, and wherein the lower end of dust arrester is equipped with discharge gate, and the hot-air that condenser can come out pulse jet area cools down,
Product is discharged by the discharge gate of dust arrester, qualified discharge after exhaust gas is handled by active carbon case.
Preferred: the pulse jet area includes infrared emittance, infrared remote receiver, gas bag, pulse valve and high pressure spray
Mouth, the infrared emittance and infrared remote receiver are located at the two sides below dust gathering arrester, and gas bag is symmetrically fixed on dust gathering arrester
Side is simultaneously connected with high pressure nozzle by pulse valve, and infrared emittance and infrared remote receiver shut out the light situation according to material, is judged
It whether there is material on conveyer belt, and then control pulse valve and high pressure nozzle injection compressed air, carry out stripping purpose product.This reality
It there is clear advantage compared with prior art and the utility model has the advantages that the utility model simple structure and reasonable design, gives up with novel
Abandoning colored filter can be quickly by the color light resistance layer oxidation point between tin indium oxide and glass under electric heating area certain temperature
Solution removing, removes continuous blowing of the discarded colored filter of color light resistance layer in pulse jet area Jing Guo compressed air, aoxidizes
Indium tin thin film can remove substrate of glass completely, and after above-mentioned double diffusion, exhaust gas and mix dust air-flow in device pass through
The processing of condenser, dust arrester and active carbon case obtains indium tin oxide particles enrichment body, as purpose product, and exhaust gas is through activity
Qualified discharge enters atmosphere after charcoal processing, and whole process is safe, fast, efficient, pollution-free.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the pulse jet area vertical section structure schematic diagram in the utility model.
Wherein in figure: 10, shell；11, support frame；12, conveyer belt；14, thermocouple；15, material inlet；16, material goes out
Mouthful；17, electric heating switchs；18, blowing dust switch；19, thermal chamber；20, resistance heating module；21, electric furnace heating wire；26, it gives up
Abandon colored filter；30, gas bag；31, pulse valve；32, high pressure nozzle；33, dust gathering arrester；34, condenser；36, dust arrester；37,
Discharge gate；39, active carbon case；40, infrared emittance；41, infrared remote receiver；50, air-introduced machine.
Specific embodiment
As depicted in figs. 1 and 2, a kind of for recycling the device of tin indium oxide in discarded colored filter, including shell 10,
Support frame 11, conveyer belt 12, thermal chamber 19 and product collector unit, the shell 10 are supported by support frame 11,
Shell 10 and product collector unit are tightly connected, and thermal chamber 19 is equipped in shell 10, and conveyer belt 12 is located at thermal chamber and production
The lower section of product collector unit, the thermal chamber 19 includes electric heating area and pulse jet area, wherein discarded colored filter
The 26 electric heating areas faced up into thermal chamber 19 containing tin indium oxide are made between tin indium oxide and glass by heating
The fully oxidized decomposition of color light resistance layer, the discarded colored filter after color light resistance layer oxygenolysis enters pulse jet area
Afterwards, tin indium oxide is blown off by the compressed air in pulse jet area from glass surface and is fallen off, the heat containing indium tin oxide particles
Air enters product collector unit and is collected, and exhaust gas is discharged by the air-introduced machine 50 of product collector unit.The conveyer belt
12 are made of 304 stainless (steel) wire bands, can tolerate 500 DEG C to 800 DEG C high temperature.The electric heating area is by electric furnace heating wire 21 and refractory brick
The resistance heating module 20 of composition forms, and the temperature in electric heating area is detected by the thermocouple 14 being equipped in shell 10, and
Temperature is adjusted as needed.The product collector unit includes dust gathering arrester 33, condenser 34, dust arrester 36, active carbon case 39
With air-introduced machine 50, dust gathering arrester 33 is connected by pipeline with condenser 34, and condenser 34 is connected with dust arrester 36, dust arrester 36 and work
Property charcoal case 39 be connected, active carbon case 39 is connected with air-introduced machine 50, and wherein the lower end of dust arrester 36 is equipped with discharge gate 37, condenser 34
The hot-air that can be come out to pulse jet area cools down, and product is discharged by the discharge gate 37 of dust arrester 36, and exhaust gas is by active carbon
Qualified discharge after the processing of case 39.The pulse jet area includes infrared emittance 40, infrared remote receiver 41, gas bag 30, pulse
Valve 31 and high pressure nozzle 32, the infrared emittance 40 and infrared remote receiver 41 are located at the two sides of 33 lower section of dust gathering arrester, gas bag
30 are symmetrically fixed on the top of dust gathering arrester 33 and are connected by pulse valve 31 with high pressure nozzle 32, infrared emittance 40 and infrared connect
It receives device 41 to be shut out the light situation according to material, judge with the presence or absence of material on conveyer belt 12, and then control pulse valve 31 and high pressure
Nozzle 32 sprays compressed air, carrys out stripping purpose product.
When it is implemented, the conveyer belt 12 is made of heat-resisting material, thermal chamber 19 divides for electric heating area and pulse spray
Area is blown, electric heating area is provided with thermocouple 14 and resistance heating module 20, there is electric furnace heating wire 21 in resistance heating module 20.Pulse spray
It blows area and is provided with gas bag 30, pulse valve 31, high pressure nozzle 32, infrared emittance 40 and infrared remote receiver 41.Product collector unit
It is formed including dust gathering arrester 33, condenser 34, dust arrester 36, active carbon case 39 and air-introduced machine 50.
The working principle of the present embodiment is as follows:
Start the device by electric heating switch 17 and blowing dust switch 18, discarded colored filter 26 contains indium oxide
After being placed upwardly on conveyer belt 12 of tin thin film, enter thermal chamber 19 from material inlet 15, resistance heating module 20 makes
Electric heating area temperature reaches setting value, discard colored filter 26 during electric heating area passes through, indium tin oxide films with
Color light resistance layer between substrate of glass is oxidized decomposition removing, and the discarded colored filter 26 for removing color light resistance layer enters arteries and veins
Punching blowing area, the light of 40 directive infrared remote receiver 41 of infrared emittance has been blocked with certain thickness discarded colored filter 26
Line, trigger pulse spray system, the compressed air in gas bag 30 by pulse valve 31, by high pressure nozzle 32 it is intermittent spray to it is discarded
The indium tin oxide films on 26 surface of colored filter are discarded from glass under the injection of air pulse in 26 surface of colored filter
Substrate falls off, and under the action of air-introduced machine 50, the indium tin oxide particles mixing hot-air to fall off enters condensation by dust gathering arrester 33
Device 34 mixes hot-air cooling in condenser 34, and subsequently into dust arrester 36, indium tin oxide particles are collected here, and
Become final tin indium oxide richness group product from the discharge of discharge gate 37, remaining exhaust gas, which enters active carbon case 39, to carry out at absorption
Reason, is discharged into atmosphere eventually by air-introduced machine 50 is up to standard.The process of the recovering and processing discarded colored filter of the device, the degree of automation
Height, the tin indium oxide rate of recovery is high, qualified discharge after generated exhaust gas is handled by activated carbon adsorption, can generate preferable economy
And environmental benefit.
Technical principle of the utility model has been described above with reference to specific embodiments.These descriptions are intended merely to explain this reality
With novel principle, and it cannot be construed to the limitation to scope of protection of the utility model in any way.Based on the explanation herein,
Those skilled in the art, which does not need to pay for creative labor, can associate with other specific implementation modes of this utility model,
These modes are fallen within the protection scope of the utility model.
Claims (5)
1. a kind of for recycling the device of tin indium oxide in discarded colored filter, it is characterised in that: including shell, support frame,
Conveyer belt, thermal chamber and product collector unit, the shell are supported by support frame, shell and product collector unit
Be tightly connected, be equipped with thermal chamber in shell, conveyer belt is located at the lower section of thermal chamber and product collector unit, it is described it is hot at
Reason room includes electric heating area and pulse jet area, wherein discarded colored filter contain tin indium oxide face up into heat treatment
Electric heating area in room makes the fully oxidized decomposition of the color light resistance layer between tin indium oxide and glass, chromatic photoresist by heating
After discarded colored filter after floor oxygenolysis enters pulse jet area, by the compressed air in pulse jet area by indium oxide
Tin blows off from glass surface to fall off, and the hot-air containing indium tin oxide particles enters product collector unit and is collected, and exhaust gas is logical
Cross the air-introduced machine discharge of product collector unit.
2. according to claim 1 a kind of for recycling the device of tin indium oxide in discarded colored filter, feature exists
In: the conveyer belt is made of 304 stainless (steel) wire bands, can tolerate 500 DEG C to 800 DEG C high temperature.
3. according to claim 1 a kind of for recycling the device of tin indium oxide in discarded colored filter, feature exists
In: the resistance heating module that the electric heating area is made of electric furnace heating wire and refractory brick forms, and the temperature in electric heating area passes through outer
The thermocouple being equipped in shell is detected, and temperature is adjusted as needed.
4. according to claim 1 a kind of for recycling the device of tin indium oxide in discarded colored filter, feature exists
In: the product collector unit includes that dust gathering arrester, condenser, dust arrester, active carbon case and air-introduced machine, dust gathering arrester pass through pipeline
It is connected with condenser, condenser is connected with dust arrester, and dust arrester is connected with active carbon case, and active carbon case is connected with air-introduced machine,
The lower end of middle dust arrester is equipped with discharge gate, and the hot-air that condenser can come out pulse jet area cools down, and product is by dust
The discharge gate of device is discharged, qualified discharge after exhaust gas is handled by active carbon case.
5. according to claim 4 a kind of for recycling the device of tin indium oxide in discarded colored filter, feature exists
In: the pulse jet area includes infrared emittance, infrared remote receiver, gas bag, pulse valve and high pressure nozzle, and described is infrared
Generator and infrared remote receiver are located at the two sides below dust gathering arrester, and gas bag is symmetrically fixed on above dust gathering arrester and passes through pulse valve
It is connected with high pressure nozzle, infrared emittance and infrared remote receiver shut out the light situation according to material, judge whether deposit on conveyer belt
In material, and then pulse valve and high pressure nozzle injection compressed air are controlled, carrys out stripping purpose product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821106884.9U CN208413878U (en) | 2018-07-13 | 2018-07-13 | It is a kind of for recycling the device of tin indium oxide in discarded colored filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821106884.9U CN208413878U (en) | 2018-07-13 | 2018-07-13 | It is a kind of for recycling the device of tin indium oxide in discarded colored filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208413878U true CN208413878U (en) | 2019-01-22 |
Family
ID=65124773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821106884.9U Active CN208413878U (en) | 2018-07-13 | 2018-07-13 | It is a kind of for recycling the device of tin indium oxide in discarded colored filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208413878U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108640148A (en) * | 2018-07-13 | 2018-10-12 | 徐州菲宁环保科技有限公司 | A kind of device for recycling tin indium oxide in discarded colored filter |
-
2018
- 2018-07-13 CN CN201821106884.9U patent/CN208413878U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108640148A (en) * | 2018-07-13 | 2018-10-12 | 徐州菲宁环保科技有限公司 | A kind of device for recycling tin indium oxide in discarded colored filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Tao Inventor after: Xue Qisen Inventor after: Chen Xichao Inventor after: Wang Shuai Inventor after: Zhu Hong Inventor after: Li Zelin Inventor before: Zhu Hong Inventor before: Li Zelin |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20240515 Address after: No. 104, Building 7, Qingdao Future Technology Industrial Park, No. 106, Xiangyang Road, Chengyang District, Qingdao City, Shandong Province, 266000 Patentee after: Beichen advanced recycling technology (Qingdao) Co.,Ltd. Country or region after: China Address before: 221200 No. 021, Zone C, suigu science and Technology Park, No. 35, Tianhong North Road, Ningjiang Industrial Park, Suining County, Xuzhou City, Jiangsu Province Patentee before: XUZHOU FEINING ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Country or region before: China |