CN102688847B - Dry cassava raw material screening device - Google Patents
Dry cassava raw material screening device Download PDFInfo
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- CN102688847B CN102688847B CN201210138498.9A CN201210138498A CN102688847B CN 102688847 B CN102688847 B CN 102688847B CN 201210138498 A CN201210138498 A CN 201210138498A CN 102688847 B CN102688847 B CN 102688847B
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- dust
- raw material
- containing sand
- dust recycling
- water
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Abstract
The present invention relates to a kind of separator of particulate material, a kind of Tapioca chips material screening device, it is characterised in that main body internal upper part is provided with Rotary hanging hook, and middle part is provided with cylinder round sifter, or provided with Vibration Screen extension set, bottom is provided with the barrel of fines collection containing sand；The external bottom of main frame is provided with the basin of fines collection containing sand, and the external top of main frame is provided with dust recycling can；Rotated by electronic sifted net drum, the large-block material in cassava dry raw material is separated with the powder material containing sand；Its advantage：The cleaner production of Tapioca chips material screening is realized, makes production safer and cleaning.Desanding is individually carried out, the workload of cassava materials desanding is greatly reduced, is that there is provided condition for the thorough sand removed in raw material.Using device for recovering powder, dust loss is reduced, is conducive to liquor ratio of raw material.Dust reclaims the slurry produced, all reclaims and crushes spice for pulverizing process raw material, has reached water-saving consumption-reduction purpose.
Description
Technical field
The present invention relates to a kind of separator of particulate material, more particularly to a kind of screening dress using Tapioca chips as raw material
Put.
Background technology
With the continuous scarcity of petroleum-based energy, the energy products of alternative oil are all actively being found in countries in the world.Therefore,
Biomass energy also just becomes the research and development focus of the world today.Alcohol fuel is due to combustion cleaning, higher octane
Value, renewable, raw material sources extensively etc. bioenergy the characteristics of, be widely used in automotive field part replacing gasoline
Fuel.
Being presently used for the raw material of fuel ethanol production mainly has corn, wheat, sugarcane or molasses, cassava, sweet potato, beet
Etc. starchiness class raw material.The U.S. is main to produce alcohol fuel by raw material of corn；It is Brazilian mainly to be given birth to sugarcane or cane molasses
Alcohol fuel is produced, China is due to being populous nation, and Food Security is natively very prominent, and Fuel Alcohol Development must just be walked non-
The road of grain ethanol, National Development and Reform Committee proposes Fuel Alcohol Development, to adhere to the principle of " grain not being striven with the people, ground is not striven with grain ".For
This, produces the raw material of alcohol fuel, is concentrated mainly on cassava, sweet potato, banana dasheen, the root of kudzu vine, sugar grass and stalk etc., currently should
With it is most be cassava materials.
China produces ethanol with cassava materials, and its raw material sources is mainly the ground import such as Thailand, Cambodia, Vietnam and the country
Cassava, because Tapioca chips material quality is uneven, particularly some are national, and Tapioca chips belongs to natural drying, and impurity content is higher,
In the case where raw material supply and demand is nervous, some material suppliers also artificially can add sea sand, to alcohol into cassava dry raw material
Manufacturing enterprise brings very big harm.
Now, the Alcohol Production enterprise by raw material of Tapioca chips, raw material enters after factory, is store first using Ku Nei or air storage
Deposit, artificial unpacking is used during production, pulverizing process is directly transported to small forklift, is discharged into the ground pit type feeding groove before Belt Conveying
In, ground pit type feeding groove bottom shutter is opened, on belt conveyor under raw material, raw material is on belt in course of conveying, using people
Work picks the debris such as woven bag bar, broken fag end, the ratchel in cassava materials, and tramp iron separator is installed in the belt conveyor end, will
Ironware in raw material is absorbed, and then, raw material is crushed into pulverizer.The sand removing process used, is mostly raw material powder
The feed liquid after spice, spice is carried out after broken, using desilting ditch or riffler, artificial interval sand removing process, artificial intermittently operated is deposited
Subject matter be except sand coarse aggregate ratio is very low only 30% or so, contain starch granules in sand, it is not easy to wash out, with sand one
Rise and be thrown away, cause the loss of tapioca, cause alcohol yield to reduce, contain in feed liquid in sand, production process to equipment
Serious wear, has a strong impact on service life of equipment.
According to the analysis of cassava dry raw material, the particle diameter of sand in Tapioca chips is typically all thin in below 5mm, and Tapioca chips
Powder is mixed, below 5mm fine powder containing sand even in Tapioca chips, shared cassava gross dry weight ratio, generally 15%~
30%, in order to desanding purpose there is provided a kind of new technology of cassava dry raw material desanding, sand fine powder sieving will be contained and come out, not only
Desanding expense is wanted to substantially reduce, it is also energy-saving to Alcohol Production, play very important effect.
The content of the invention
It is an object of the invention to the deficiency for overcoming prior art, there is provided a kind of device using Tapioca chips as the desanding of raw material
A kind of Tapioca chips material screening device, including closed bucket elevator, fine powder containing sand air conveying device, closed belt
Conveyer, hangs tramp iron separator, it is characterised in that the top in main body is provided with Rotary hanging hook, and middle part is provided with electronic rotary screen
Extension set, bottom is provided with the barrel of fines collection containing sand；The external bottom of main frame be provided with the basin of fines collection containing sand, main frame in vitro it is upper
Side is provided with dust recycling can；Cylinder round sifter inclination angle is 10 °~15 °, and mesh size is 3~5mm, passes through electronic sifted
Net drum is rotated, and the large-block material in cassava dry raw material is separated with the powder material containing sand, bulk materials are constantly from roller
To screening machine flowing underneath in screen cloth, finally from screening machine discharging opening, flow out by closed belt conveyor, be sent to feed bin, contain
Sand fine powder is constantly fallen from sifted mesh, is fallen in fines collection cylinder；Top in main body is provided with high level alarm, main
Bottom in body is provided with low-level alarm；Top in main body is provided with Rotary hanging hook, and Rotary hanging hook is rolled with cylinder round sifter
Cylinder rotation, the woven bag bar and fag end in raw material are collected on hook, primarily serve the effect for removing thread debris in raw material；
Bottom in main body is provided with blanking push-pull valve, by controlling blanking push-pull valve to carry out blanking, by the air conveying device of fine powder containing sand,
Fine powder is sent to spice desanding system；Described device for recovering powder, is provided with induced-draught fan and dust at the top of closed screening machine
Recycling can, dust recycling can inner top is provided with water distribution sieve plate, and technique water spray system is by process water at the top of dust recycling can
Spray into, water is evenly distributed on sieve plate, and the process water flowed down from sieve plate hole is mixed with the air-flow containing dust, by the dust in air-flow
It is dissolved in water, falls on dust recycling can bottom, reaches that dust reclaims purpose, the air being purified, through being arranged at the top of dust recycling can
After gas collection device, directly empty.The dust slurry of recovery, after being stirred by dust recycling can side agitator, is transported to raw material
Pulverizing process, for spice.
A kind of Tapioca chips material screening device, including closed bucket elevator, fine powder containing sand air conveying device, closed belt
Conveyer, hangs tramp iron separator, it is characterised in that being provided with electronic Vibration Screen extension set, Vibration Screen extension set in main body
Provided with vibration screen, bottom is provided with the barrel of fines collection containing sand；The external bottom of main frame is provided with the basin of fines collection containing sand, main frame
External top is provided with dust recycling can；Screening machine inclination angle is 10 °~15 °, and mesh size is 3~5mm, by being shaken in screening machine
Dynamic screen cloth, the large-block material in cassava dry raw material is separated with the powder material containing sand, bulk materials are constantly from roller screen cloth
It is interior, finally from screening machine discharging opening, to flow out by closed belt conveyor to screening machine flowing underneath, be sent to feed bin, it is thin containing sand
Powder is constantly fallen from screening machine vibratory sieve mesh, is fallen in the barrel of fines collection containing sand；Reported provided with high-order on top in main body
Bottom in alert device, main body is provided with low-level alarm；Bottom in main body is provided with blanking push-pull valve, by controlling blanking to insert
Plate valve carries out blanking, and by the air conveying device of fine powder containing sand, fine powder is sent into spice desanding system；Set at the top of closed screening machine
Have an induced-draught fan and dust recycling can, dust recycling can inner top, provided with water distribution sieve plate, technique water spray system by process water from
Sprayed at the top of dust recycling can, water is evenly distributed on sieve plate, and the process water flowed down from sieve plate hole is mixed with the air-flow containing dust,
Dust in air-flow is dissolved in water, dust recycling can bottom is fallen on, reaches that dust reclaims purpose, the air being purified, through powder
The dust of dirt is reclaimed after exhaust gas collection transposition, is directly emptied.The dust slurry of recovery, is stirred by dust recycling can side agitator
Afterwards, raw material pulverizing process is transported to, for spice.
The present invention has advantages below：
1st, raw material feeding reclaims new structure device using closed bucket elevator, closed screening machine and dust, realizes
The cleaner production of Tapioca chips material screening, makes production safer and cleaning.
2nd, sieved before raw material crushing, the cassava block in raw material more than 5mm and the tapioca starch less than 5mm are passed through
Screening machine is separated, and is reduced raw material crushing quantity, is reduced Grin-ding energ7, can be directed to the tapioca starch containing sand less than 5mm, individually be carried out
Desanding, greatly reduces the workload of cassava materials desanding, is that there is provided condition for the thorough sand removed in raw material.
3rd, material screening process, using device for recovering powder, reduces dust loss, is conducive to liquor ratio of raw material, simultaneously
Working environment is cleaner.
4th, dust reclaims the slurry produced, all reclaims and crushes spice for pulverizing process raw material, has reached water-saving consumption-reduction
Purpose.
Brief description of the drawings
Fig. 1 is closed cylinder round sifter schematic diagram of the present invention.
Have in figure, closed bucket elevator 1, Rotary hanging hook 2, closed cylinder round sifter 3, hand opening door 4, sifted
Net drum 5, high level alarm 6, the barrel of fines collection containing sand 7, blanking push-pull valve 8, the air conveying device of fine powder containing sand 9, dust is reclaimed
Tank 10, technique water spray system 11, agitator 12, belt conveyor 13 hangs tramp iron separator 14, induced-draught fan 15, low-level alarm
16, the basin of fines collection containing sand 17, the conveying of fine powder containing sand pipeline 18, closed conveyer belt open section 19, raw material removes powder after screening
Broken process 20, water distribution sieve plate 21, exhaust gas collection device 22 removes spice 23, and dust collection transfer pipeline 24 flows sub- pipe 25, feeding
Mouth 26.
Fig. 2 is closed Vibration Screen extension set schematic diagram of the present invention
Have in figure, closed bucket elevator 1, Vibration Screen extension set 33, hand opening door 4, screening machine vibrating screen mesh 55 is high
Level alarm 6, the barrel of fines collection containing sand 7, blanking push-pull valve 8, the air conveying device of fine powder containing sand 9, dust recycling can 10, agitator
12, belt conveyor 13 hangs tramp iron separator 14, and induced-draught fan 15, low-level alarm 16, the basin of fines collection containing sand 17 is thin containing sand
Powder conveying pipeline 18, closed conveyer belt open section 19, raw material removes pulverizing process 20, water distribution sieve plate 21, exhaust gas collection after screening
Device 22, removes spice 23, and dust collection transfer pipeline 24 flows sub- pipe 25, feeding port 26.
Embodiment
The present invention is made with specific embodiment below in conjunction with the accompanying drawings and being further described in detail.
As shown in figure 1, the top in main body is provided with Rotary hanging hook 2, middle part is provided with electronic cylinder round sifter 3, bottom
Provided with the barrel of fines collection containing sand 7；The external bottom of main frame is provided with the air conveying device of fine powder containing sand 9 and the basin of fines collection containing sand
17, the external top of main frame is provided with dust recycling can 10；Feeding port 26 is fed, and passes through closed bucket elevator 1 and stream pipe
25, material enters cylinder round sifter 3, and Rotary hanging hook 2 is installed on cylinder round sifter 3, and hand opening is provided with outside cylinder round sifter 3
Door 4, sifted net drum 5 and high level alarm 6 are provided with cylinder round sifter 3, is arranged below and contains in cylinder round sifter 3
Sand fines collection barrel 7, during fine powder blanking, there is push-pull valve 8, on the barrel of fines collection containing sand 7, installs low-level alarm 16.
Impurity removing：Rotary hanging hook 2 on rotary screen, with cylinder round sifter 3, the raw material in screen barrel revolves together
Turn, strand shape debris in the feed will be mingled with, extension is entangled on Rotary hanging hook 2, it is to avoid under the strand shape debris in raw material is flowed into
Procedure, has reached the purpose for removing the strand shape debris in raw material；When cylinder round sifter 3 stops screening raw material, rolling is opened
Hand opening door 4 on shaft screen extension set 3, the strand shape eliminating impurities that winding is suspended on Rotary hanging hook 2 are thrown away；Meanwhile, it is more than
The cassava block of mesh size, is conveyed on belt conveyor 13, and by closed conveying band open section 19, artificial removal of impurities and suspension are removed
Ironware 14 is removed after iron, and the cassava block raw material after screening removes pulverizing process 20；
As shown in Fig. 2 the middle part in main body is provided with electronic Vibration Screen extension set 33, Vibration Screen extension set 33, if
There is screening machine vibrating screen mesh 55；In the bottom of Vibration Screen extension set 33, provided with the barrel of fines collection containing sand 7；Under main frame is external
Portion is provided with the basin of fines collection containing sand 17, the external top of main frame, provided with dust recycling can 10；
Fig. 1 and Fig. 2 difference of the present invention is that one is that main body Inside sifter machine is cylinder round sifter, and another is main frame
Internal screening machine is Vibration Screen extension set.
The present invention from feeding, the chain control of raw material feeding, dust reclaim, fine powder containing sand conveying, drum-type screening machine and
The situation of oscillatory type screening machine is identical.
The closed feeding of bucket elevator 1, raw material is sent to closed Vibration Screen extension set 33 through flowing sub- pipe 25, and raw material enters
In electronic vibrating screen mesh 55, material screening is carried out, by the continuous rotation of vibrating screen mesh 55, mesh size is will be greater than
Cassava block and sand, cassava fine powder sieving less than mesh size are opened, more than the cassava block of mesh size, on screen cloth along
Vibration Screen extension set 33, flow forward is exported from Vibration Screen extension set 33, is flowed on belt conveyor 13, is sent out.
The chain control of raw material feeding：When the material quantity in Vibration Screen extension set 33 is in a high position, high level alarm 6 is opened
It is dynamic, and automatic linkage controls closed bucket elevator 1 to slow down lifting speed or stop carrying material；Material in Vibration Screen extension set 33
When position is less than a high position, high level alarm 6 is automatically terminated, and the closed bucket elevator 1 of chain promoter, and startup carries material and raising carries material
Speed, increases material conveying capacity, so ensures that the stable operation during material screening.More than the cassava of mesh size
Block, is conveyed on belt conveyor 13, by closed conveying band open section 19, and artificial removal of impurities and suspension tramp iron separator 14 are removed after iron,
Cassava block raw material after screening, removes pulverizing process 20；
Dust is reclaimed：At the top of closed Vibration Screen extension set 33, provided with induced-draught fan 15, pass through dust collection transfer pipeline
24, enter dust recycling can 10, in the top mounting process water spray system 11 and water distribution sieve plate 21 of dust recycling can 10.Into powder
The air-flow of the fine powder containing cassava of dirt recycling can 10 is by centrifuging, and most of dust granules fall into tank bottom, contain a small amount of dust
Air-flow enter dust recycling can 10, the air-flow containing a small amount of dust under water distribution sieve plate 21 towards tank top flow, pass through technique
Water spray system 11 constantly into tank uniformly spray water by water distribution sieve plate 21, and water uniformly flows downward along the mesh of water distribution sieve plate 21, with to
The air-flow containing a small amount of dust of upper flowing is fully contacted, and the dust in air-flow is recovered in water and falls into pot bottom, from cloth water sieve
The air-flow of the top of plate 21 outflow, from tank deck discharge, reclaims into dust and is vented to collection device 22, finally empty.In addition, reclaiming
Dust mixed in dust recycling can 10 with water, by agitator 12 in dust recycling can 10, after stirring, be transported to original
Expect that pulverizing process is used for spice.
Fine powder containing sand is conveyed：In the bottom of Vibration Screen extension set 33, the exit of the barrel of fines collection containing sand 7, with blanking plate
Valve 8 is connected, and blanking push-pull valve 8 is connected with the air conveying device of fine powder containing sand 9, and the air conveying device of fine powder containing sand 9 passes through the conveying of fine powder containing sand
Pipeline 18 is connected with the basin of fines collection containing sand 17.The air conveying device of fine powder containing sand 9 transported out from blanking push-pull valve 8 is fed
Mouthful, blow and sent out to angle in the same direction with wind, malleation general mood stream, which mixes with fine powder and carries fine powder, passes through the conveying pipeline of fine powder containing sand
18, fine powder is sent into the basin of fines collection containing sand 17 and stored；Pass through the chain control of low-level alarm 16 and blanking push-pull valve 8
System, prevents pouring in down a chimney for malleation general mood stream.
Claims (2)
1. a kind of Tapioca chips material screening device, including closed bucket elevator (1), the air conveying device of fine powder containing sand (9), closed
Belt conveyor (13) and suspension tramp iron separator (14), it is characterised in that the top in main body is provided with Rotary hanging hook (2), middle part
Provided with electronic cylinder round sifter (3), bottom is provided with the barrel of fines collection containing sand (7)；The external bottom of main frame is provided with thin containing sand
Powder collects basin (17), and the external top of main frame is provided with dust recycling can (10)；Cylinder round sifter inclination angle be 10 °~15 °, screen cloth
Aperture is 3~5mm, is rotated by electronic sifted net drum (5), by the large-block material in cassava dry raw material with containing sand
Powder material separation, bulk materials constantly out of cylinder round sifter (3) screen cloth to screening machine flowing underneath, finally from screening machine
Discharging opening flows out, and is sent to feed bin by closed belt conveyor (13), fine powder containing sand is constantly fallen from sifted mesh, is fallen on
In the barrel of fines collection containing sand (7)；The bottom that top in main body is provided with high level alarm (6), main body is provided with low level
Alarm (16)；Rotary hanging hook (2) is rotated with sifted net drum (5), and the woven bag bar and fag end in raw material are collected into
On hook, thread debris in raw material is removed；Bottom in main body is provided with blanking push-pull valve (8), by controlling blanking push-pull valve
(8) blanking is carried out, by the air conveying device of fine powder containing sand (9), fine powder is sent to spice desanding system；Described cassava dry raw material sieve
Separating device, is provided with induced-draught fan (15) and dust recycling can (10), dust recycling can (10) inner top at the top of cylinder round sifter (3)
Provided with water distribution sieve plate (21), technique water spray system (11) sprays into process water at the top of dust recycling can (10), and water is uniform
It is distributed on water distribution sieve plate (21), the process water flowed down from sieve plate hole is mixed with the air-flow containing dust, and the dust in air-flow is molten
In water, dust recycling can (10) bottom is fallen on, reaches that dust reclaims purpose, the air being purified, through dust recycling can (10)
The dust at top is reclaimed and is vented to after collection device (22), is directly emptied；The dust slurry of recovery, passes through dust recycling can (10)
After side agitator (12) stirring, raw material pulverizing process is transported to, for spice.
2. a kind of Tapioca chips material screening device, it is characterised in that electronic Vibration Screen extension set (33) is provided with main body, is shaken
Dynamic sieve screening machine (33) has vibrating screen mesh (55), and bottom is provided with the barrel of fines collection containing sand (7)；The external bottom of main frame
Provided with the basin of fines collection containing sand (17), the external top of main frame is provided with dust recycling can (10)；Screening machine inclination angle be 10 °~
15 °, mesh size be 3~5mm, by screening machine internal vibration sieve screen cloth (55), by the large-block material in cassava dry raw material with
Powder material separation containing sand, bulk materials are constantly interior to screening machine flowing underneath from vibrating screen mesh (55), finally from screening
Machine discharging opening is flowed out, and feed bin is sent to by closed belt conveyor (13), and fine powder containing sand is constantly from screening machine vibrating screen mesh
(55) hole is fallen, and is fallen in the barrel of fines collection containing sand (7)；Top in main body is provided with high level alarm (6), main body
Bottom be provided with low-level alarm (16)；Bottom in main body is provided with blanking push-pull valve (8), by controlling blanking push-pull valve
(8) blanking is carried out, by the air conveying device of fine powder containing sand (9), fine powder is sent to spice desanding system；In Vibration Screen extension set (33)
Top is provided with dust recycling can (10), and dust recycling can (10) inner top is provided with water distribution sieve plate (21), technique water spray system
(11) process water is sprayed at the top of dust recycling can (10), water is evenly distributed on water distribution sieve plate (21), from sieve plate hole stream
Under process water mixed with the air-flow containing dust, the dust in air-flow is dissolved in water, dust recycling can (10) bottom is fallen on, reaches
Dust reclaims purpose, and the air being purified reclaims through the dust at the top of dust recycling can (10) and is vented to collection device (22)
Afterwards, directly empty；The dust slurry of recovery, after being stirred by dust recycling can (10) side agitator (12), is transported to raw material powder
Broken process, for spice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210138498.9A CN102688847B (en) | 2012-04-26 | 2012-04-26 | Dry cassava raw material screening device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210138498.9A CN102688847B (en) | 2012-04-26 | 2012-04-26 | Dry cassava raw material screening device |
Publications (2)
| Publication Number | Publication Date |
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| CN102688847A CN102688847A (en) | 2012-09-26 |
| CN102688847B true CN102688847B (en) | 2017-07-28 |
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| CN201210138498.9A Active CN102688847B (en) | 2012-04-26 | 2012-04-26 | Dry cassava raw material screening device |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103736583B (en) * | 2014-01-15 | 2015-08-12 | 江苏韦欧机械有限公司 | A kind of grain desanding system and the method with its desanding |
| CN108621337B (en) * | 2018-04-27 | 2020-11-10 | 台州米珂制冷设备股份有限公司 | Waste plastic recycling system |
| CN108515638B (en) * | 2018-04-27 | 2020-10-20 | 重庆市潼南区九橡化大环保科技有限公司 | Waste plastic recycling method |
| CN110694899B (en) * | 2019-09-20 | 2020-10-27 | 苏州科腾软件开发有限公司 | Inside material separation structure of clean maintenance device of town road |
| CN112113399A (en) * | 2020-09-07 | 2020-12-22 | 安徽云龙粮机有限公司 | Integrated grain conveying, screening and drying system |
| CN112221668B (en) * | 2020-10-01 | 2021-12-14 | 张家界朝阳冲农产品开发有限责任公司 | Sweet potato starch extraction element |
| CN114453212B (en) * | 2022-02-28 | 2024-02-09 | 中涂唐彩(山东)涂料科技有限责任公司 | Powder coating fine powder recovery device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11319715A (en) * | 1998-05-22 | 1999-11-24 | Ishikawajima Harima Heavy Ind Co Ltd | Cylindrical screen rotation type sieving apparatus |
| CN201140173Y (en) * | 2007-09-08 | 2008-10-29 | 南宁邦克电力设备有限责任公司 | Tapioca starch finished product screen |
| CN201791503U (en) * | 2010-09-08 | 2011-04-13 | 邹平金刚新材料有限公司 | Tandem power material homogenizing system |
| CN201832538U (en) * | 2010-11-04 | 2011-05-18 | 中山粤海饲料有限公司 | Deodorizing and dust-removing device of shrimp material production line |
| CN202130880U (en) * | 2011-06-07 | 2012-02-01 | 杭州明云混凝土有限公司 | Powder storing control system |
| CN202570588U (en) * | 2012-04-26 | 2012-12-05 | 中石油东北炼化工程有限公司吉林设计院 | Screening plant for dried cassava raw materials |
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2012
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Address after: 132002 East End Economic and Trade Building of Tongtan Road, Jilin Province Patentee after: JILIN DESIGNING INSTITUTE OF CNPC NORTHEAST REFINING & CHEMICAL ENGINEERING Co.,Ltd. Address before: 132001 Block A, Jihua Economic and Trade Center, Tongtan Road, Changyi District, Jilin Province Patentee before: PetroChina Northeast Refining&Chemicals Engineering Company Limited, Jilin Design Institute |
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Effective date of registration: 20190603 Address after: 132002 3-6 and 9-13 floors of Block A, Jihua Economic and Trade Center, Tongtan Road, Changyi District, Jilin Province Patentee after: PetroChina Jilin Chemical Engineering Co.,Ltd. Address before: 132002 East End Economic and Trade Building of Tongtan Road, Jilin Province Patentee before: JILIN DESIGNING INSTITUTE OF CNPC NORTHEAST REFINING & CHEMICAL ENGINEERING Co.,Ltd. |
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