CN206345756U - Slurrying yellow liquor concentrate and drying equipment - Google Patents
Slurrying yellow liquor concentrate and drying equipment Download PDFInfo
- Publication number
- CN206345756U CN206345756U CN201621452207.3U CN201621452207U CN206345756U CN 206345756 U CN206345756 U CN 206345756U CN 201621452207 U CN201621452207 U CN 201621452207U CN 206345756 U CN206345756 U CN 206345756U
- Authority
- CN
- China
- Prior art keywords
- unit
- spray drying
- evaporation element
- main body
- pump
- 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.)
- Active
Links
- 239000012141 concentrate Substances 0.000 title claims abstract description 13
- 238000001035 drying Methods 0.000 title claims abstract description 12
- 239000012528 membrane Substances 0.000 claims abstract description 48
- 238000001694 spray drying Methods 0.000 claims abstract description 36
- 238000001704 evaporation Methods 0.000 claims abstract description 29
- 230000008020 evaporation Effects 0.000 claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 238000005189 flocculation Methods 0.000 claims abstract description 15
- 230000016615 flocculation Effects 0.000 claims abstract description 15
- 238000004062 sedimentation Methods 0.000 claims abstract description 15
- 239000003814 drug Substances 0.000 claims abstract description 10
- 238000002203 pretreatment Methods 0.000 claims abstract description 8
- 238000010926 purge Methods 0.000 claims abstract description 7
- 239000002455 scale inhibitor Substances 0.000 claims abstract description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 230000008676 import Effects 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 11
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 10
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 10
- 238000009833 condensation Methods 0.000 claims description 10
- 230000005494 condensation Effects 0.000 claims description 10
- 238000000926 separation method Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000000395 magnesium oxide Substances 0.000 claims description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000002351 wastewater Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Landscapes
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
A kind of slurrying yellow liquor concentrate and drying equipment, the utility model are made up of pretreatment unit, Multistage Membranes upgrading unit, evaporation element, spray drying unit, are sequentially connected in series.Pretreatment unit is provided with flocculation basin, sedimentation basin, intermediate pool, pre-treatment medicaments throwing device.Multistage Membranes upgrading unit is provided with feed pump, membrane concentrator group, scale inhibitor feeding device, purging system.It is connected again with multi-effect evaporator after the preheated device of evaporation element, feed pump and preheater connection, spray drying unit is provided with cyclone separator through hopper, heater, pump, access spray drying main body, main body.The utility model has the advantages that entering Multistage Membranes upgrading unit after being pre-processed using pretreatment unit to stoste, multistage concentration is carried out to feed liquor through Multistage Membranes upgrading unit again, clear liquid connects postorder processing or in line, dope sends into evaporation element feeding spray drying unit after further concentration, by being reclaimed after spray drying treatment, more energy consumption is saved than being sent directly into evaporation element.
Description
Technical field
The utility model is related to a kind of water treatment facilities, more particularly to a kind of slurrying yellow liquor concentrate and drying equipment.
Background technology
Papermaking enterprise especially stalk papermaking enterprise is using get the raw materials ready (selection raw material, cleaning), cut-out, extraction straw mostly
Skin, pre-processes boiling, drifts, cleans, and is beaten, configuration various additives, paper stock mixing, copy paper, press dewatering, is dried into paper etc.
Production process, each production process produces the waste water of amplification quantity side by side in process of production.Especially middle section water yellow liquor has row
The features such as water is big, its complicated pollutional load of pollutant is high.These waste water are drained into conventional water treatment system in the past, investment is built
If the useful component in costly and waste water is not recycled, it is impossible to realize the recycling of resource.With national environmental protection department pair
The raising of wastewater discharge standard and the requirement of Sustainable Development of Enterprises, recycling for resource are extremely urgent.Recycle skill
Art is the key for solving such wastewater treatment requirement.
Because the content of organics of slurrying middle section water yellow liquor is high, be directly entered biochemical treatment, intractability is big, and invests into
This is big.At present mostly using being reprocessed after evaporation, its operating cost is higher and the easy fouling of evaporator is difficult to clean off.
The content of the invention
The purpose of this utility model is, for defect present in prior art, to provide a kind of slurrying yellow liquor concentrate and drying
Equipment.The utility model enters Multistage Membranes upgrading unit after being pre-processed using pretreatment unit to stoste, then passes through multistage
Film upgrading unit carries out multistage concentration to feed liquor, and clear liquid connects postorder processing or in line, and dope feeding evaporation element is by further
Feeding spray drying unit after concentration, by being reclaimed after spray drying treatment.
The utility model includes：Pretreatment unit, Multistage Membranes upgrading unit, evaporation element, spray drying unit, its feature
It is that the pretreatment unit, Multistage Membranes upgrading unit, evaporation element, spray drying unit are sequentially connected in series, pretreatment is single
Member, which is provided with flocculation basin, sedimentation basin, intermediate pool, flocculation basin, is provided with flocculation stirring machine, pre-treatment medicaments throwing device, flocculation
Pond, sedimentation basin, intermediate pool are spaced, flocculation basin and the common wall of sedimentation basin, and the hole that liquid is opened on common wall flows into sedimentation basin；It is heavy
Shallow lake pond and the common wall of intermediate pool, the hole that liquid is opened on common wall flows into intermediate pool；By the height control liquid turnover of pool wall
Flow, intermediate pool outlet be connected through pipeline with the charging pump inlet of Multistage Membranes upgrading unit, Multistage Membranes upgrading unit be provided with pump,
Membrane concentrator group, scale inhibitor feeding device, purging system, pump are connected through pipeline with membrane concentrator group, multistage membrane concentrator group production
The reserved connection postorder processing or in line of clear liquid mouthful, membrane concentrator group production dope mouthful is connected with evaporation element import, evaporation element warp
Preheater, feed pump and preheater import are connected, then be connecteds with multi-effect evaporator, the separate type dope outlet of multi-effect evaporator and
Unit inlet connection is spray-dried, spray drying unit is through hopper, heater, pump, access spray drying main body, spray drying master
Body is connected with cyclone separator, exhaust blower, air heater, air blower respectively.
The pre-treatment medicaments throwing device of the pretreatment unit is to add magnesia, sodium hydroxide, sodium carbonate medicament
Equipment.
The membrane concentrator group of the Multistage Membranes upgrading unit is that scale inhibitor feeding device is provided with 1~3 group, membrane concentrator group
And purging system.
The evaporation element is provided with feed pump, preheater, condenser, multi-effect evaporator, condensation chamber, and multi-effect evaporator is set again
Effective heating chamber, separation chamber, circulating pump.Preheater import is connected with feed pump, and preheater outlet connects with multi-effect evaporator import
Connect, the separation chamber of multi-effect evaporator is connected with condensation chamber import, the outlet of condensation chamber is concentrated solution outlet.
In the spray drying unit provided with hopper, pump, heater, spray drying main body, cyclone separator, exhaust blower,
Air heater, air blower.Hopper, through pump access spray drying main body, is spray-dried main body, air blower, air add with heater
Hot device and cyclone separator, exhaust blower are respectively connected to be spray-dried main body.
Advantage of the present utility model is to enter Multistage Membranes after pre-processing stoste using pretreatment unit to concentrate list
Member, then multistage concentration is carried out to feed liquor by Multistage Membranes upgrading unit, clear liquid connects postorder processing or in line, and dope feeding evaporation is single
Member feeding spray drying unit after further concentration, by being reclaimed after spray drying treatment, than being sent directly into evaporation element
Save more energy consumption.
Brief description of the drawings
Fig. 1 structural schematic block diagrams of the present utility model；
Fig. 2 pretreatment unit structural representations of the present utility model；
Fig. 3 Multistage Membranes upgrading unit structural representations of the present utility model；
Fig. 4 evaporation element structural representations of the present utility model；
Fig. 5 spray drying cellular construction schematic diagrams of the present utility model.
In figure：1 flocculation basin, 1-1 inlets, 1-2 drains, 1-3 mixers, 1-4 pre-treatment medicaments throwing device, 2 sink
Shallow lake pond, 2-1 mud discharging mouths, 3 intermediate pools, 3-1 liquid outlets, 3-2 drains, 4 feed pumps, 5 membrane concentrator groups, 5-1 antisludging agents are thrown
Feeder apparatus, 5-2 purging systems, 6 production clear liquids mouthful, 7 production dope mouths, 8 feed pumps, 9 preheaters, 10 condensers, 11 multi-effect evaporators,
11-1 heating chambers, 11-2 separation chambers, 11-3 circulating pumps, 12 condensation chambers, 13 concentrated solution outlets, 14 hoppers, 15 heaters, 16 pumps,
17 spray drying main bodys, 18 cyclone separators, 19 exhaust blowers, 20 air heaters, 21 air blowers.
Embodiment
Embodiment of the present utility model is further illustrated below in conjunction with the accompanying drawings：
Referring to Fig. 1, the present embodiment is by pretreatment unit, Multistage Membranes upgrading unit, evaporation element, spray drying unit group
Into.Enter Multistage Membranes upgrading unit after being pre-processed using pretreatment unit to stoste, then pass through Multistage Membranes upgrading unit pair
Feed liquor carries out multistage concentration, and clear liquid connects postorder processing or in line, and dope sends into evaporation element and spray is sent into after further concentration
Mist drying unit, by being reclaimed after spray drying treatment.Pretreatment unit, Multistage Membranes upgrading unit, evaporation element, spray drying
Unit is sequentially connected in series.
Referring to Fig. 2, pretreatment unit is provided with flocculation basin 1, sedimentation basin 2, intermediate pool 3.Flocculation basin 1, sedimentation basin 2, centre
Pond 3 is spaced, flocculation basin 1 and the common wall of sedimentation basin 2, and the hole that liquid is opened on common wall flows into sedimentation basin 2.Sedimentation basin 2 is with
Between the wall altogether of pond 3, hole that liquid is opened on common wall flows into intermediate pool 3；Enter outflow by the height control liquid of pool wall.Wadding
Flocculation stirring machine 1-3, pre-treatment medicaments throwing device 1-4, the pre-treatment medicaments throwing device of pretreatment unit are provided with solidifying pond 1
1-4 is to add magnesia, sodium hydroxide, the equipment of sodium carbonate medicament.The liquid outlet 3-1 of intermediate pool 3 is through pipeline and Multistage Membranes
The import of feed pump 4 connection of upgrading unit.Intermediate pool 3 is provided with drain 3-2.Sedimentation basin 2 is provided with mud discharging mouth 2-1.
Referring to Fig. 3, Multistage Membranes upgrading unit is provided with feed pump 4, membrane concentrator group 5, scale inhibitor feeding device 5-1, cleaning
System 5-2, feed pump 4 is connected through pipeline with membrane concentrator group 5, the reserved connection postorder processing of production clear liquid mouthful 6 of membrane concentrator group 5
Or it is in line.The production of membrane concentrator group 5 dope mouthful 7 is connected with evaporation element import.The membrane concentrator group 5 of Multistage Membranes upgrading unit is 1
~3 groups, the present embodiment is 2 groups.Scale inhibitor feeding device 5-1 and purging system 5-2 is provided with membrane concentrator group 5.
Referring to Fig. 4, evaporation element is provided with feed pump 8, preheater 9, condenser 10, multi-effect evaporator 11, condensation chamber 12, many
Effect evaporator 11 is additionally provided with effect heating chamber 11-1, separation chamber 11-2, circulating pump 11-3.Evaporation element is through pipeline and feed pump 8, pre-
The hot import of device 9 connection, then be connected with the import of multi-effect evaporator 11, the separation chamber 11-2 of multi-effect evaporator 11 outlet and condensation
Room 12 is connected, and the outlet of condensation chamber 12 is concentrated solution outlet 13.Concentrated solution outlet 13 is connected with spray drying unit inlet.
Referring to Fig. 5, divide in spray drying unit provided with hopper 14, heater 15, pump 16, spray drying main body 17, whirlwind
From device 18, exhaust blower 19, air heater 20, air blower 21.Unit is spray-dried through hopper 14, heater 15, pump 16, access
Main body 17 is spray-dried, air blower 21, air heater 20 and cyclone separator 18, exhaust blower 19 are respectively connected to spray drying
Main body.
The technique of the present embodiment is that Multistage Membranes are concentrated with evaporating, being spray-dried the processing slurrying yellow liquor concentrate being combined and do
Dry technique.Its technique is comprised the steps of：
(1) stoste is sent into pretreatment unit, magnesia, sodium hydroxide, sodium carbonate etc. is added in pretreatment unit, profit
Produced and removed after precipitation with the silicon in stoste, calcium, magnesium plasma reaction with magnesia, sodium hydroxide, sodium carbonate etc., so as to reach
The feed liquor requirement of Multistage Membranes upgrading unit；
(2) liquid after step (1) processing is sent into Multistage Membranes upgrading unit, liquid carried out using Multistage Membranes dense
Contracting is handled, and isolates the clear liquid that requirement is met in treatment fluid, and is to meet evaporation element requirement by the dope concentration for the treatment of fluid
Dope；
(3) dope after step (2) processing is sent into evaporation element, dope carried out further deeply by evaporating
Feeding spray drying unit after degree concentration；
(4) by the super dope feeding spray drying unit after step (3) processing, using being spray-dried principle to super dense
Recovery is dried in liquid.
20 times are more than to the concentration of stoste in the step (2), clear liquid output capacity is more than 70% concentrate.The present embodiment
Dope rate is 20 times.
Claims (5)
1. a kind of slurrying yellow liquor concentrate and drying equipment, including：Pretreatment unit, Multistage Membranes upgrading unit, evaporation element, spraying
Drying unit, it is characterised in that the pretreatment unit, Multistage Membranes upgrading unit, evaporation element, spray drying unit are gone here and there successively
Connection connection, pretreatment unit, which is provided with flocculation basin, sedimentation basin, intermediate pool, flocculation basin, is provided with flocculation stirring machine, pre-treatment medicaments
Throwing device, flocculation basin and the common wall of sedimentation basin, the hole that liquid is opened on common wall flows into sedimentation basin；Sedimentation basin is total to intermediate pool
Wall, the hole that liquid is opened on common wall flows into intermediate pool；Intermediate pool exports the feed pump through pipeline Yu Multistage Membranes upgrading unit
Import is connected, and Multistage Membranes upgrading unit is provided with feed pump, membrane concentrator group, scale inhibitor feeding device, purging system, feed pump warp
Pipeline is connected with membrane concentrator group, and the reserved connection postorder processing or in line of membrane concentrator group production clear liquid mouthful, membrane concentrator group production is dense
Liquid mouthful is connected with evaporation element import, the preheated device of evaporation element, feed pump and preheater import connection, then with multi-effect evaporator
Connection, the separate type dope outlet of multi-effect evaporator is connected with spray drying unit inlet, and spray drying unit is through hopper, heating
Device, pump, access spray drying main body, spray drying main body respectively with cyclone separator, exhaust blower, air heater, air blower
Connection.
2. slurrying yellow liquor concentrate according to claim 1 and drying equipment, it is characterised in that the pretreatment unit it is pre-
Treatment agent throwing device is to add magnesia, sodium hydroxide, the equipment of sodium carbonate medicament.
3. slurrying yellow liquor concentrate according to claim 1 and drying equipment, it is characterised in that the Multistage Membranes upgrading unit
Provided with feed pump, membrane concentrator group, scale inhibitor feeding device and purging system.
4. slurrying yellow liquor concentrate according to claim 1 and drying equipment, it is characterised in that the evaporation element is additionally provided with
Feed pump, preheater, condenser, multi-effect evaporator, condensation chamber, multi-effect evaporator set effective heating chamber, separation chamber, circulation again
Pump, preheater import is connected with feed pump, preheater outlet be connected with multi-effect evaporator import, the separation chamber of multi-effect evaporator and
Condensation chamber import is connected, and the outlet of condensation chamber is concentrated solution outlet.
5. slurrying yellow liquor concentrate according to claim 1 and drying equipment, it is characterised in that in the spray drying unit
Be additionally provided with hopper, pump, heater, spray drying main body, cyclone separator, exhaust blower, air heater, air blower, hopper with
Heater is spray-dried main body, air blower, air heater and cyclone separator, air draft through pump access spray drying main body
Machine is respectively connected to be spray-dried main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621452207.3U CN206345756U (en) | 2016-12-28 | 2016-12-28 | Slurrying yellow liquor concentrate and drying equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621452207.3U CN206345756U (en) | 2016-12-28 | 2016-12-28 | Slurrying yellow liquor concentrate and drying equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206345756U true CN206345756U (en) | 2017-07-21 |
Family
ID=59323182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621452207.3U Active CN206345756U (en) | 2016-12-28 | 2016-12-28 | Slurrying yellow liquor concentrate and drying equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206345756U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108308368A (en) * | 2018-03-21 | 2018-07-24 | 山东禹王生态食业有限公司 | A kind of soybean protein bean clear water processing system and processing method |
-
2016
- 2016-12-28 CN CN201621452207.3U patent/CN206345756U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108308368A (en) * | 2018-03-21 | 2018-07-24 | 山东禹王生态食业有限公司 | A kind of soybean protein bean clear water processing system and processing method |
| CN108308368B (en) * | 2018-03-21 | 2021-05-28 | 山东禹王生态食业有限公司 | Soybean protein clear water treatment system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207243712U (en) | A kind of dehydration car of vehicle-mounted sludge concentration device | |
| CN104436845B (en) | A kind of plate and frame filter press filtrate water processing system and processing method | |
| CN206345756U (en) | Slurrying yellow liquor concentrate and drying equipment | |
| CN101798768A (en) | Waste paper regeneration environmental protection device and method | |
| CN104671315B (en) | A kind of method and system of full factory waste water zero discharge | |
| CN204325027U (en) | Quick sewage disposal device | |
| CN205803185U (en) | Waste water of paper mill recycle device | |
| CN108249668A (en) | Slurrying yellow liquor concentrate and dry Processes and apparatus | |
| CN107902829A (en) | Cold rolling emulsion and oil-bearing wastewater reuse technology and its device | |
| CN209456210U (en) | One kind is for the personal reasonable reclaiming system of water of Boiler water Feeding System | |
| CN109133465A (en) | A kind of Waste Heat Reuse vacuum membrane distillation zero discharge treatment device and method | |
| CN106007334A (en) | Water purification plant sludge treatment system and treatment method thereof | |
| CN104098214B (en) | Containing wastewater from catalyst treatment system | |
| CN210795831U (en) | Double-effect falling film and single-effect forced circulation double-row double-steam-inlet MVR evaporation crystallization system | |
| CN214289946U (en) | Washing and desalting device for waste incineration fly ash | |
| CN115625181A (en) | Phosphogypsum harmless treatment system | |
| CN209442659U (en) | The system of sodium sulphate is recycled from high saliferous modified starch waste water | |
| CN111573962B (en) | External micro-interface papermaking sewage treatment system and treatment method | |
| CN211998906U (en) | Desulfurization waste water flue concentration treatment device | |
| CN103058434B (en) | Zero-emission recycling device for water paper or raw cement board papermaking wastewater | |
| CN203833652U (en) | Device for treating chitin soda boiling waste water | |
| CN209442762U (en) | A kind of circulation water recycling device | |
| CN209507820U (en) | A kind of water treatment system of the exhaust gas processing device of wood-based plate | |
| CN207091241U (en) | A kind of ozone air-float device suitable for micropollutant water processing | |
| CN207973610U (en) | A kind of sewage disposal system suitable for aggregate production |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 200000, 4th floor, Block A, Oriental Fisherman's Wharf, 1088 Yangshupu Road, Yangpu District, Shanghai Patentee after: Mai Wang Environmental Technology Co.,Ltd. Country or region after: China Address before: 200135, room 1001, golden peach mansion, 1900 Shangcheng Road, Shanghai, Pudong New Area Patentee before: MCWONG ENVIRONMENTAL TECHNOLOGY Co.,Ltd. Country or region before: China |