CN107339220B - Dual reflux oil separates taper orifice plate noise reduction compressor periodic off-gases recyclable device - Google Patents
Dual reflux oil separates taper orifice plate noise reduction compressor periodic off-gases recyclable device Download PDFInfo
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- CN107339220B CN107339220B CN201710790578.5A CN201710790578A CN107339220B CN 107339220 B CN107339220 B CN 107339220B CN 201710790578 A CN201710790578 A CN 201710790578A CN 107339220 B CN107339220 B CN 107339220B
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- Prior art keywords
- noise reduction
- gas
- orifice plate
- inner cylinder
- periodic
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- 239000007789 gas Substances 0.000 title claims abstract description 94
- 230000000737 periodic effect Effects 0.000 title claims abstract description 40
- 230000009467 reduction Effects 0.000 title claims abstract description 27
- 238000010992 reflux Methods 0.000 title claims abstract description 19
- 230000009977 dual effect Effects 0.000 title claims abstract description 17
- 230000008676 import Effects 0.000 claims abstract description 12
- 101100298222 Caenorhabditis elegans pot-1 gene Proteins 0.000 claims description 7
- 238000004064 recycling Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 10
- 230000001351 cycling effect Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 11
- 238000006073 displacement reaction Methods 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 238000000926 separation method Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000011265 semifinished product Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000002318 cardia Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption 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
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0027—Pulsation and noise damping means
- F04B39/0083—Pulsation and noise damping means using blow off silencers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
- B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention discloses a kind of dual reflux oil to separate taper orifice plate noise reduction compressor periodic off-gases recyclable device, it include catch pot, the import of catch pot, exhaust outlet and oil discharge outlet, inner cylinder, annular spiral board, Swirl plate and vent muffler, annular spiral board is by the inside of catch pot and the recirculation zone and the secondary back region of lower part that are separated into top, inlet tube is communicated with a recirculation zone, the upper end of inner cylinder is communicated with exhaust outlet, and the lower end of inner cylinder is communicated with secondary back region.The present invention collects noise reduction, oil separates, gas is recovered in one, gas is made full use of to achieve the effect that oil, gas are completely separated by the reflux of Swirl plate, enter the recycling and reusing of gas holder using the noise reduction of umbellate form orifice plate and to gas, make to produce low consumption, low emission, high efficiency, achieve the purpose that gas recycles cycling and reutilization, reduce the pollution of air, energy saving forms resource closed-loop flow new model.
Description
Technical field
The present invention relates to coal chemical industry gas compression technical field, specifically a kind of dual reflux oil separates taper orifice plate noise reduction pressure
Contracting machine periodic off-gases recyclable device.
Background technique
Currently, the production model of China's little nitrogen industry is substantially " energy --- product --- noise pollution and exhaust gas
The linear production model of discharge ".Cardia in little nitrogen industry --- compression belongs to the middle-end hilllock of little nitrogen production process
Position, it is the main source of hot-tempered sound, exhaust gas, to peripheral ring that in compressor parking maintenance, the discharge of periodic off-gases, which is directly entered atmosphere,
Border pollution is very big.Its corrosive gas, solid fine grain, aerosol form object etc. for discharging scatters in nigh equipment, to equipment
Corrosion is quickly.The wherein discharge of semi-finished product gas causes the pollution of a large amount of resource loss and atmosphere.Environment is protected, circulation is walked
Economic development road, it has also become chemical industry is urgent at present and difficult task, the control of environmental pollution require enterprise continuous
Seek new breakthrough.
Summary of the invention
The purpose of the invention is to make up the deficiency of periodic off-gases recycling and noise reduction technology, a kind of dual reflux oil separation is provided
Taper orifice plate noise reduction compressor periodic off-gases recyclable device, collection noise reduction, oil separation, gas are recovered in one, and structure is simple, operation side
Just, significant effect reduces noise and atmosphere pollution.
Technical scheme is as follows:
A kind of dual reflux oil separation taper orifice plate noise reduction compressor periodic off-gases recyclable device, includes catch pot,
Be characterized in that: the top of the catch pot is equipped with the import being arranged along the tangential direction of its periphery, catch pot
Top and bottom end are respectively equipped with exhaust outlet and oil discharge outlet, and the inside of catch pot is equipped with inner cylinder, the upper end of the inner cylinder and institute
It states and is connected at the top of catch pot；Ring is fixed between the inner wall of the catch pot and the lower end of the inner tank theca
Shape spiral board, the annular spiral board by the inside of the catch pot be separated into top a recirculation zone and under
The secondary back region in portion, the import are communicated with a recirculation zone；The upper end of the inner cylinder and the exhaust
Mouthful communicate, the lower end of inner cylinder is communicated with the secondary back region, and the bottom of inner cylinder is fixed with Swirl plate, in inner cylinder
The top of the Swirl plate is successively fixed with multiple taper orifice plates；Vent muffler, institute are connected on the exhaust outlet
The inside for stating vent muffler is successively fixed with multiple flat orifice plates and taper orifice plate from bottom to top.
The dual reflux oil separates taper orifice plate noise reduction compressor periodic off-gases recyclable device, it is characterised in that: described
Import is connected with the inlet tube for leading to periodic off-gases surge tank.
The dual reflux oil separates taper orifice plate noise reduction compressor periodic off-gases recyclable device, it is characterised in that: described
Exhaust outlet is connected with the exhaust pipe for leading to gas holder, and gas holder valve is equipped in the exhaust pipe.
The dual reflux oil separates taper orifice plate noise reduction compressor periodic off-gases recyclable device, it is characterised in that: described
Oil discharge outlet is connected with the oil exit pipe for leading to accumulator tank.
The dual reflux oil separates taper orifice plate noise reduction compressor periodic off-gases recyclable device, it is characterised in that: described to put
The input end of empty muffler is equipped with emergency blow-down valve, and the outlet end of vent muffler is equipped with rain cover.
The present invention using primary flow back annular spiral board and secondary back Swirl plate, in periodic off-gases oil, gas into
Row separation, high-rate discharge air-flow carry out noise reduction and baffling by taper (umbrella shape) muffling hole plate, are returning the periodic off-gases of compressor
It is purified during receiving and noise reduction is saved with reaching the pollution that the recycling and reusing of periodic off-gases reduces air and noise
Energy consumption.
The present invention uses dual reflux oil separation principle, achievees the effect that Oil in circulating gas, gas are completely separated, muffling hole plate processing
It is tapered, increase the area that gas contacts in flow process with muffling hole plate, gas by taper orifice plate play baffling and
Noise reduction double effects recycle the waste oil in compressor periodic off-gases thoroughly, and reach erasure effect.
1, the import of catch pot using tangent line design, make recycling gas medium around inner cylinder eddy flow pour container again to
Lower baffling reaches the equally distributed effect around inner cylinder, by primary downward eddy flow, utilizes air impingement annular spiral board
Principle, make that oil, oil subdivision is separated in gas.
2, periodic off-gases enter the lower section of Swirl plate after an eddy flow, and gas touches catch pot spherical surface bottom
Turn back and change direction upwards, flow back, it is secondary by Swirl plate, separate oil, the oil molecule in gas again, gas into
One step is purified.
3, recycling gas carries out baffling and noise reduction by the taper orifice plate in inner cylinder, by the gas of secondary back through bellmouth
The baffling of plate plays and expands contact surface, is uniformly distributed and erasure effect, since taper orifice plate and reflux gas contact surface are big, gas
Body is preferable by the small erasure effect of the more resistances of eyelet, effectively raises erasure effect of the air-flow in inner cylinder, makes the gas of outflow
Body noise substantially reduce.
4, vent muffler is vent muffler outside multi-stag orifice plate, two layer plane muffling hole plates and one layer of taper noise reduction
Orifice plate is made in the case where production system is stopped in emergency, periodic off-gases using the principle of orifice plate decompression and the baffling noise reduction of taper orifice plate
Multiple noise reduction is achieved the effect that when emergency blow-down, vent muffler structure is simple, and inside does not need any sound-absorbing material, cost
It is low, it is durable to be not required to repair.
Beneficial effects of the present invention:
The present invention provides a kind of recycling process unit for the recycling of compressor periodic off-gases, solves because periodic off-gases can not
The problem that high efficiente callback recycles and directly emptying generates noise, the device up to 95%, reduce the rate of recovery of emptying substance
Pollution of the periodic off-gases to ambient enviroment, makes full use of limited resources, substantially improves ambient enviroment, surrounding devices surface
Corrosion has also obtained effective control, and the finished product, semi-finished product in production are so incensed that effective recycling and reusing.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention.
Fig. 2 is assembling structure schematic diagram of the present invention.
Specific embodiment
Referring to Fig. 1, a kind of dual reflux oil separation taper orifice plate noise reduction compressor periodic off-gases recyclable device, includes oil gas point
From tank 1, the top of catch pot 1 is equipped with the import 2 being arranged along the tangential direction of its periphery, the top of catch pot 1
It is respectively equipped with exhaust outlet 3 and oil discharge outlet 4 with bottom end, the inside of catch pot 1 is equipped with inner cylinder 5, the upper end of inner cylinder 5 and oil gas point
Top from tank 1 is connected；Annular spiral board 6, ring are fixed between the lower end of 5 outer wall of inner wall and inner cylinder of catch pot 1
Shape spiral board 6 by the inside of catch pot 1 and the recirculation zone 7 and the secondary back region 8 of lower part that are separated into top,
Import 2 is communicated with a recirculation zone 7；The upper end of inner cylinder 5 is communicated with exhaust outlet 3, the lower end and secondary back region 8 of inner cylinder 5
It communicates, the bottom of inner cylinder 5 is fixed with Swirl plate 9, is successively fixed with multiple cones in the top of Swirl plate 9 in inner cylinder 5
Shape orifice plate 10；Vent muffler 11 is connected on exhaust outlet 3, the inside of vent muffler 11 is successively fixed with two from bottom to top
Flat orifice plate 12 and a taper orifice plate 13.
In the present invention, import 2 is connected with the inlet tube for leading to periodic off-gases surge tank 14.
Exhaust outlet 3 is connected with the exhaust pipe for leading to gas holder, and gas holder valve 15 is equipped in exhaust pipe.
Oil discharge outlet 4 is connected with the oil exit pipe for leading to accumulator tank 16.
The input end of vent muffler 11 is equipped with emergency blow-down valve 23, and the outlet end of vent muffler 11 is equipped with rain-proof
Cover 17.
Below in conjunction with attached drawing, the present invention is further illustrated:
The present invention reaches safe and reliable, easily operated for the design of the technological process of production.The working principle of the invention is such as
Under:
1, periodic off-gases are vented program: during compressor parking maintenance, compressor periodic off-gases need slowly emptying.7 sections
The gas of discharge since pressure is higher (about 23MP), carry out single channel emptying enter 14,1 section -6 sections gases of periodic off-gases surge tank by
Not high in pressure, gas discharge can be discharged into periodic off-gases surge tank 14 according to being vented step by step by high pressure section to low pressure stage.
2, specific steps are vented: firstly, each section of cylinder import and export valve of close compressor, and be thoroughly isolated with blind plate, it is ensured that
Reliably completely cut off with production system.Secondly, first closing 1-6 sections always puts valve 18, driving and parking displacement gas blow valve 19 and emergency blow-down valve
23, the gentle tank valve 15 of 7 sections of single channel independence blow valves 20 is opened, closes 7 sections of single channel independence blow valves after recycling to 7 sections of gases
20, then open 1-6 sections and always put valve 18, then slowly recycled step by step by 6 sections to 1 section by high pressure to low pressure again and close each section of valve
Door, periodic off-gases enter periodic off-gases surge tank 14, enter gas holder by catch pot 1, to prevent gas slow into periodic off-gases
Superpressure after tank 14 is rushed, has installed safety valve 21 additional at the top of periodic off-gases surge tank 14.
3, driving and parking gas displacement blow valve: during driving and parking, for ensure overhaul and drive production safety, into
Driving and parking displacement gas blow valve 19 is installed additional before entering the main valve 22 of periodic off-gases surge tank 14, preferably to carry out to each section of cylinder of equipment
Inert gas replacement closes main valve 22, each section of emptying valve of driving and parking displacement gas blow valve 19 and compressor is opened, to each section of cylinder
Inert gas replacement is carried out, displacement gas is discharged by driving and parking displacement gas blow valve 19, and gas displacement is pressed through entering after the assay was approved
Contracting machine safety inspection and driving.
4, to ensure that system is kept the safety in production, emergency blow-down valve 23 is installed in the input end of vent muffler 11, is when encountering
System emergency is stopped suddenly, when having little time to open each section of emptying return valve step by step, can close the gas holder valve that recycling gas removes gas holder
15, caused gas holder panting and equipment that contingency occurs by rapidly gas shock to prevent gas holder, to ensure compressor and its auxiliary
The production safety of equipment and system is helped, periodic off-gases are discharged by emergency blow-down valve 23.
5, draining valve is installed in oil exit pipe, the waste oil of recycling is discharged to accumulator tank 16, is refined by the regular oil extraction of draining valve
Fabrication cycles utilize.
Of the invention is of the existing technology using solving the problems, such as, embodies " resource --- product --- regenerated resources "
Materials and equipment resources closed-loop flow new model.It is fine as the sustainable development idea of essential characteristic using low consumption, low emission, high efficiency
Ground embodies the coordination of development and environmental protection.The extensive concern of popularization and application of the invention by chemical industry.
Claims (5)
- It include catch pot 1. a kind of dual reflux oil separates taper orifice plate noise reduction compressor periodic off-gases recyclable device, it is special Sign is: the top of the catch pot is equipped with the import being arranged along the tangential direction of its periphery, the top of catch pot End and bottom end are respectively equipped with exhaust outlet and oil discharge outlet, and the inside of catch pot is equipped with inner cylinder, the upper end of the inner cylinder with it is described It is connected at the top of catch pot；Annular is fixed between the inner wall of the catch pot and the lower end of the inner tank theca The inside of the catch pot is separated into recirculation zone and the lower part on top by spiral board, the annular spiral board Secondary back region, the import are communicated with a recirculation zone；The upper end of the inner cylinder and the exhaust outlet phase Logical, the lower end of inner cylinder is communicated with the secondary back region, and the bottom of inner cylinder is fixed with Swirl plate, described in inner cylinder The top of Swirl plate is successively fixed with multiple taper orifice plates；Vent muffler is connected on the exhaust outlet, it is described to put The inside of empty muffler is successively fixed with multiple flat orifice plates and taper orifice plate from bottom to top.
- 2. dual reflux oil according to claim 1 separates taper orifice plate noise reduction compressor periodic off-gases recyclable device, feature Be: the import is connected with the inlet tube for leading to periodic off-gases surge tank.
- 3. dual reflux oil according to claim 1 separates taper orifice plate noise reduction compressor periodic off-gases recyclable device, feature Be: the exhaust outlet is connected with the exhaust pipe for leading to gas holder, and gas holder valve is equipped in the exhaust pipe.
- 4. dual reflux oil according to claim 1 separates taper orifice plate noise reduction compressor periodic off-gases recyclable device, feature Be: the oil discharge outlet is connected with the oil exit pipe for leading to accumulator tank.
- 5. dual reflux oil according to claim 1 separates taper orifice plate noise reduction compressor periodic off-gases recyclable device, feature Be: the input end of the vent muffler is equipped with emergency blow-down valve, and the outlet end of vent muffler is equipped with rain cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710790578.5A CN107339220B (en) | 2017-09-05 | 2017-09-05 | Dual reflux oil separates taper orifice plate noise reduction compressor periodic off-gases recyclable device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710790578.5A CN107339220B (en) | 2017-09-05 | 2017-09-05 | Dual reflux oil separates taper orifice plate noise reduction compressor periodic off-gases recyclable device |
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| Publication Number | Publication Date |
|---|---|
| CN107339220A CN107339220A (en) | 2017-11-10 |
| CN107339220B true CN107339220B (en) | 2019-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710790578.5A Active CN107339220B (en) | 2017-09-05 | 2017-09-05 | Dual reflux oil separates taper orifice plate noise reduction compressor periodic off-gases recyclable device |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108730190B (en) * | 2018-05-24 | 2020-04-03 | 荣成惠德环保科技有限公司 | Pressure buffering and separating device of vapor compressor |
| CN108661913B (en) * | 2018-05-24 | 2020-04-03 | 荣成惠德环保科技有限公司 | Roots vapor compressor with buffer chamber |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87203454U (en) * | 1987-07-13 | 1988-08-17 | 舒文奎 | Automobile oil-water separator with automatic foul-water draining effect automobile |
| CN1876612A (en) * | 2005-06-07 | 2006-12-13 | 浙江工业大学 | Three methods combined highly effective methanol separator |
| JP2008286075A (en) * | 2007-05-16 | 2008-11-27 | Toyota Boshoku Corp | Gas-liquid separator |
| CN102847618A (en) * | 2012-09-18 | 2013-01-02 | 东北石油大学 | Secondary separation cyclone |
| CN104481641A (en) * | 2014-11-14 | 2015-04-01 | 力帆实业(集团)股份有限公司 | Motorcycle exhaust purification system |
-
2017
- 2017-09-05 CN CN201710790578.5A patent/CN107339220B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87203454U (en) * | 1987-07-13 | 1988-08-17 | 舒文奎 | Automobile oil-water separator with automatic foul-water draining effect automobile |
| CN1876612A (en) * | 2005-06-07 | 2006-12-13 | 浙江工业大学 | Three methods combined highly effective methanol separator |
| JP2008286075A (en) * | 2007-05-16 | 2008-11-27 | Toyota Boshoku Corp | Gas-liquid separator |
| CN102847618A (en) * | 2012-09-18 | 2013-01-02 | 东北石油大学 | Secondary separation cyclone |
| CN104481641A (en) * | 2014-11-14 | 2015-04-01 | 力帆实业(集团)股份有限公司 | Motorcycle exhaust purification system |
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| Publication number | Publication date |
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| CN107339220A (en) | 2017-11-10 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
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Denomination of invention: Double return oil separation conical orifice plate muffler compressor purge gas recovery device Effective date of registration: 20200927 Granted publication date: 20190111 Pledgee: Anhui Linquan rural commercial bank Limited by Share Ltd. Pledgor: ANHUI JINMEI ZHONGNENG CHEMICAL INDUSTRIAL Co.,Ltd. Registration number: Y2020980006516 |
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Date of cancellation: 20210924 Granted publication date: 20190111 Pledgee: Anhui Linquan rural commercial bank Limited by Share Ltd. Pledgor: ANHUI JINMEI ZHONGNENG CHEMICAL INDUSTRIAL Co.,Ltd. Registration number: Y2020980006516 |
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Denomination of invention: Exhaust gas recovery device of double return oil separation conical orifice silencing compressor Effective date of registration: 20210930 Granted publication date: 20190111 Pledgee: Anhui Linquan rural commercial bank Limited by Share Ltd. Pledgor: ANHUI JINMEI ZHONGNENG CHEMICAL INDUSTRIAL Co.,Ltd. Registration number: Y2021980010167 |
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Date of cancellation: 20220919 Granted publication date: 20190111 Pledgee: Anhui Linquan rural commercial bank Limited by Share Ltd. Pledgor: ANHUI JINMEI ZHONGNENG CHEMICAL INDUSTRIAL Co.,Ltd. Registration number: Y2021980010167 |
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Denomination of invention: Exhaust gas recovery device of double return oil separation conical orifice silencing compressor Effective date of registration: 20220929 Granted publication date: 20190111 Pledgee: Anhui Linquan rural commercial bank Limited by Share Ltd. Pledgor: ANHUI JINMEI ZHONGNENG CHEMICAL INDUSTRIAL Co.,Ltd. Registration number: Y2022980016923 |
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Date of cancellation: 20230912 Granted publication date: 20190111 Pledgee: Anhui Linquan rural commercial bank Limited by Share Ltd. Pledgor: ANHUI JINMEI ZHONGNENG CHEMICAL INDUSTRIAL Co.,Ltd. Registration number: Y2022980016923 |
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Denomination of invention: Double reflux oil separation conical orifice plate silencing compressor exhaust gas recovery device Effective date of registration: 20231116 Granted publication date: 20190111 Pledgee: Anhui Linquan rural commercial bank Limited by Share Ltd. Pledgor: ANHUI JINMEI ZHONGNENG CHEMICAL INDUSTRIAL Co.,Ltd. Registration number: Y2023980065881 |