CN106732380B - A kind of volatile organic compound from waste gas hypersober - Google Patents
A kind of volatile organic compound from waste gas hypersober Download PDFInfo
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- CN106732380B CN106732380B CN201710128450.2A CN201710128450A CN106732380B CN 106732380 B CN106732380 B CN 106732380B CN 201710128450 A CN201710128450 A CN 201710128450A CN 106732380 B CN106732380 B CN 106732380B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
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Abstract
The present invention relates to volatile organic compound from waste gas Treatment process fields, more particularly to a kind of volatile organic compound from waste gas hypersober, it is characterized in that: including following components: 100 parts of circulating fluidized bed combustion coal boiler fly ash, 5~10 parts of sulphur, 1~1.5 part of disulphur dichloride；Component is according to parts by weight.High-value-use boiler exhaust gas and its such as flue dust that discharges pollutants reach the purpose of providing a kind of cheap VOCs adsorbent and energy-saving and emission-reduction, resource circulation utilization to prepare VOCs adsorbent.
Description
Technical field
The present invention relates to volatile organic compound from waste gas Treatment process fields, and in particular to a kind of volatile organic compound
Object exhaust gas hypersober.
Background technique
The gaseous pollutant of industrial discharge is the main source of air environmental pollution object, and wherein volatile organic compounds is useless
Gas (VOCs) is the gaseous pollutant all to environment with serious harm effect, while being also to influence operator in workplace
Health occupational source, it derives from the chemical work such as paint, coating, coating, lubricating oil, rubber extensively
Industry.Since it acts on the considerable damage of human body and natural environment, country has put into effect relevant laws and regulations and it is administered and is discharged
Carry out strict control.The currently used processing method of VOCs treatment technology has combustion method, chemical oxidization method, chemical absorbing
Method, absorption method, bioanalysis etc..Wherein absorption method is a kind of common organic waste-gas purification effective ways, is to utilize various solids
The method that adsorbent (such as active carbon, activated carbon fibre, molecular sieve) carries out adsorption cleaning to the pollutant in discharge exhaust gas.It inhales
Attached method equipment is simple, applied widely, purification efficiency is high, is a kind of traditional waste gas pollution control and treatment technology, and most widely used at present
Treatment process.The superiority and inferiority of adsorption cleaning performance depends mainly on the performance of adsorbent, and domestic adsorbent at present is usually particle
Active carbon and activated carbon fibre become solid waste after adsorbing organic exhaust gas due to adsorbent, such as use elution method or heating
Method again row activation can generate new pollutant, the method usually disposed according to the concerned countries specification of solid waste at
It sets, therefore the higher operating costs of adsorbent.And circulating fluidized bed boiler flying dust is most common discarded during boiler for producing
Object, the aerial dust of loss pollute the environment, how to turn waste into wealth and high-value-use such as to prepare volatility organic
Compound exhaust air hypersober is always that the art engineers and technicians want the problem of being resolved.Chinese invention patent
(Patent No. 201410075863.5, patent name are a kind of organic exhaust gas adsorption cleanser and preparation method thereof) discloses one
Kind organic exhaust gas adsorption cleanser and preparation method thereof, is characterized in: including following raw materials in terms of mass parts: zeolite 85-
95 parts, 5-10 parts of copper oxide, 5-10 parts of FeOCl.The present invention also provides a kind of preparations of organic exhaust gas adsorption cleanser
Method.Organic exhaust gas adsorption cleanser provided by the invention, carrier zeolite thermal stability is good, adsorption capacity is strong, copper oxide and oxygen
Base iron chloride decomposition catalytic activity is high, the service life is long, the preparation method of organic exhaust gas adsorption cleanser provided by the invention, technique letter
It is single, at low cost.(Patent No. 201310387366.4, patent name are a kind of low-concentration organic exhaust gas to Chinese invention patent
Modified activated carbon absorbent and preparation method thereof) disclose the modified activated carbon absorbent and its system of a kind of low-concentration organic exhaust gas
Preparation Method, it is characterized in that: being made from the following raw materials in parts by weight: active carbon 100-120, cerium oxide 2-3, ammonium persulfate 1-2, silicon
Diatomaceous earth 70-80, lignin 3-4, attapulgite modified 8-10, appropriate amount of water.Present invention uses the oxidations such as cerium oxide, ammonium persulfate
Agent, can quick oxygenolysis organic matter；Diatomite is also used, dust particles can be effectively adsorbed；The present invention passes through spray drying,
Obtained particle is tiny, fluffy, and gap is big, and adsorption effect is good, is suitble to the purification of low-concentration organic exhaust gas, and simple process, fits
Close industrialized production.(Patent No. 201310278422.0, patent name are a kind of circulating fluidized bed boiler to Chinese invention patent
The processing method of flying dust) disclose a kind of processing method of circulating fluidized bed boiler flying dust, it is characterized in that: the processing method be by
Circulating fluidized bed boiler flying dust first carries out the modified adjustment in surface using regulator before friction electrical selection, feeds friction band to improve
The effect sorted in electric sorting machine separates charcoal uncombusted in circulating fluidized bed boiler flying dust with flying dust, obtains containing charcoal
Measure the high rich charcoal product of low flying dust and carbon content；The modified tune in surface before the circulating fluidized bed boiler flying dust friction electrical selection
Adjusting method is: in the various mode transmission process of circulating fluidized bed boiler flying dust or in the tankages such as storehouse, by regulator
Mixing sufficiently is contacted online with flying dust progress with liquid or steam state, makes flying dust that the modified adjustment in surface occur.Height after sorting contains charcoal
The charcoals product such as measure rich charcoal product and can directly return to fluidized-bed combustion boiler burning while reduce circulating ratio or being used to prepare active carbon
Or it is used as conventional fuel, the low carbon content flying dust after sorting is used as the raw materials such as cement, concrete, brick, haydite, filler.
Conventional example one is sent into Muffle furnace and is calcined using zeolite and activator (catalyst) copper oxide, FeOCl
Process prepare organic waste-gas adsorbant, be to recycle oxidation using the strong feature of zeolite large specific surface area adsorption capacity
Copper, FeOCl activation are to enhance adsorption capacity, and usual Muffle furnace is used for experimental analysis, and method description is also experimentation,
That is there are also a distances from industrialization for the technology；Conventional example two is modified work using active carbon as raw material, to it
Change processing, final step is to be sent into calcining furnace to calcine and grind, similar to carry out active carbon activation process twice: first living to raw material
Active carbon is made in change, then adsorbent is made to active carbon activation, and relatively general active carbon, the process is more complicated, and twice
Heating consumes energy higher, the also high simultaneously many of cost；The processing method of three circulating fluidized bed boiler flying dust of conventional example refers to
Surface is carried out to circulating fluidized bed boiler flying dust for the mixture of water or water and surfactant by adjusting agent to be modified, and becomes water
The raw materials such as mud, concrete, brick, haydite, filler so use and just sacrifice its biggish specific surface area and good adsorption activity
Technical characteristic and high-value-use be volatile organic compound from waste gas hypersober value.If can make ciculation fluidized
Bed boiler fly ash waste high-value-use is beneficial to us and realizes the purpose of resource-effective protection environment.
Summary of the invention
In view of the deficiencies of the prior art, the object of the present invention is to provide a kind of volatile organic compound from waste gas activated adoption
Agent, which, which is beneficial to us, which realizes, reduces cost, resource-effective, protection environment
Purpose.
In order to solve the above technical problems, the technical solution used in the present invention is: a kind of volatile organic compound from waste gas
Hypersober, it is characterized in that: including circulating fluidized bed combustion coal boiler fly ash, sulphur, disulphur dichloride, technical process medium is
Recirculating fluidized bed waste heat boiler emission.
A kind of volatile organic compound from waste gas hypersober includes following components: circulating fluidized bed combustion coal boiler
100 parts of flying dust, 5~10 parts of sulphur, 1~1.5 part of disulphur dichloride.The component is according to parts by weight.
The circulating fluidized bed combustion coal boiler fly ash is that the flue dust that circulating fluidized bed combustion coal boiler smoke is carried under one's arms is removed through dry type
The particulate matter in bulk cement storage tank being transported to after the trapping of dirt device.
Inventors have found that the circulating fluidized bed combustion coal boiler fly ash after dry collector traps enter bulk cement storage tank and every
Exhausted air, 38 μm~58 μm of partial size, specific surface area is up to 90~170m2/ g, main component Al2O3、SiO2With uncombusted C, have
Good active main component SiO2Content is about 45~55%, Al2O3Content is about 35~38%, uncombusted C content is about 3
~5%, as impurity component Si in coal after circulating fluidized bed combustion coal boiler furnace high temperature, formed under the lower situation of oxygen amount
SiO2Aerosol, carried under one's arms by the lower flue gas of oxygen amount, hit broken, aggregation is cooling, deduster trapping, into the storage of isolation air
Ash can, similarly Al2O3With uncombusted C and SiO2Equally there is biggish specific surface area and good activity, absorption volatility has
Machine compound exhaust air (VOCs) can be suitble to although ability is weaker compared with active carbon by surface active, increase dosage, design
Processing unit is resolved.
The disulphur dichloride No. CAS: 10025-67-9 is -20~-15 DEG C using temperature, as preparing sulphur glue
Rapid cooling agent, anti-transforming agent and circulating fluidized bed combustion coal boiler fly ash activating agent.
The recirculating fluidized bed waste heat boiler emission is the high-temperature flue gas warp in circulating fluidized bed combustion coal boiler furnace
After heat-exchange system heat exchange, dry collector be disposed into waste heat boiler absorb waste heat after emission.
Inventors have found that sulphur is rapidly cooled to 90 DEG C of temperature after being heated to its boiling temperature overheat sulphur steam formed above
Sulphur glue can be made below degree, be granulated to circulating fluidized bed combustion coal boiler fly ash and bonding agent is provided, while sulphur glue and circulation
The grafting development of fluidized bed burned-coal boiler fly ash surface active groups, makes absorbent particles have biggish porosity and specific surface
Product is conducive to volatile organic compound from waste gas (VOCs) absorption, while using as dumped packing and can be effectively reduced windage
And energy saving.
Inventors have found that recirculating fluidized bed waste heat boiler emission oxygen amount is generally 5%-9%, temperature is 30~35 DEG C,
It is to prepare preferably cooling sulphur glue, mixing, protection, be granulated, conveying, separation process medium, because sulphur is inflammable and explosive,
The probability fired in the environment of hypoxemia is extremely low.With disulphur dichloride collectively as cooling medium, make to overheat sulphur steam
After be rapidly cooled to 90 DEG C of temperature sulphur glue formed below, disulphur dichloride droplet package circulating fluidized bed combustion coal boiler fly ash pair
It carries out surface grafting activation.
Compared with the existing technology, the present invention, which at least contains, has the advantage that first, and it is living to prepare volatile organic compound from waste gas
Property adsorbent main material using circulating fluidized bed combustion coal boiler fly ash be during boiler for producing the most common pollutant and
Waste, loss is larger to the harm of operator in workplace, be easy to cause the occupational diseases such as pneumoconiosis, is that China's emphasis is anti-
The occupational controlled.The aerial dust of loss simultaneously pollutes surrounding air and soil, mainly adopts at present
It is handled with the methods of landfill, not only contaminated soil, but also waste of resource and manpower.And the present invention is then turned waste into wealth, and is used for
Volatile organic compound from waste gas hypersober is prepared, can not only reduce environmental pollution, greatly reduce use cost；The
Two, since circulating fluidized bed combustion coal boiler fly ash fineness reaches 38 μm~58 μm, specific surface area is up to 90~170m2/ g, it is more existing
The various acticarbon specific surface areas of technology are up to 500~3000m2/ g performance indicator has gap, and the VOCs that reach same is net
Rate, concentration of emission index, usage amount of the present invention is higher, but adsorption capacity is bigger, the period of replacement is longer, and cost is remote
Far below acticarbon, cost is only 1/10~1/20 or so, can provide a kind of cheap VOCs adsorbent；Third,
Recirculating fluidized bed waste heat boiler emission prepares volatile organic compound from waste gas as a kind of technical process medium completion and lives
The operational process of craft of cooling needed for property adsorbent, protection, mixing, separation, activation, granulation, conveying, is optimal technique
Process medium is substantially turned waste into wealth, high-value-use boiler exhaust gas；4th, it is main as needed for production process
Material and technical process medium are circulating fluidized bed combustion coal boiler fly ash and boiler exhaust gas, are substantially exactly the discharge for reducing pollutant
With turn waste into wealth, high-value-use boiler emission pollutant flue dust etc., on the one hand reduce the heavy burdens for environment treating facility, another party
Face also achievees the purpose that energy-saving and emission-reduction, resource circulation utilization；5th, recirculating fluidized bed waste heat boiler emission oxygen amount is extremely low,
It is extremely low that the probability that sulphur fires occurs in the environment of hypoxemia, is conducive to safety in production, while being situated between as the technical cooling of sulphur glue
Matter be it is highly desirable, played function of the sulphur glue as bonding agent and activating agent；6th, sulphur glue, disulphur dichloride shape
Surface active is carried out to it at droplet package circulating fluidized bed combustion coal boiler fly ash, it is stronger to be formed on its surface adsorption capacity
The grafting of VOCs activity, to improve the purifying VOCs ability of adsorbent, disulphur dichloride facile hydrolysis is seldom not engaged in reaction
Disulphur dichloride enters qualified discharge after the processing of boiler matching environment treating facility caustic wash desulfuration spray column, can utilize existing ring
Protect treatment facility, it is not necessary to separately investment construction.
Specific embodiment
Below with reference to embodiment, the present invention is described in further detail, and embodiments of the present invention are not limited thereto.
Since the circulating fluidized bed combustion coal boiler design of each manufacturer is not quite similar, Fujian day is selected to contain the limited public affairs of chemical industry
Circulating fluidized bed combustion coal boiler fly ash is taken charge of as the main material for preparing volatile organic compound from waste gas hypersober, Al2O3
Content is 35~38%, SiO2Content is 45~50%, and C content is 3~5%, recirculating fluidized bed waste heat boiler emission discharge temperature
Degree is 30~35 DEG C, oxygen amount 6%, and sulphur and disulphur dichloride are then market purchase.
Embodiment 1
A kind of volatile organic compound from waste gas hypersober is present embodiments provided, each component parts by weights meter: is followed
100 parts of ring fluidized bed coal-burning boiler flying dust, 5 parts of sulphur, 1 part of disulphur dichloride, it is formed above that sulphur is heated to its boiling temperature
Overheat sulphur steam enters granulation tower and mixes rapidly with cooling medium disulphur dichloride, recirculating fluidized bed waste heat boiler emission
90 DEG C are cooled to hereinafter, formation disulphur dichloride, sulphur glue misty liquid droplets, are bonded circulating fluidized bed combustion coal boiler fly ash granulated
At the particle constantly grown up, while wrapping up circulating fluidized bed combustion coal boiler fly ash and carrying out surface active, above-mentioned particle growth to it
To after certain diameter, the suspending power that gravity is greater than recirculating fluidized bed waste heat boiler emission falls into material collecting device sealing and protects
It deposits.
Embodiment 2
A kind of volatile organic compound from waste gas hypersober is present embodiments provided, each component parts by weights meter: is followed
100 parts of ring fluidized bed coal-burning boiler flying dust, 10 parts of sulphur, 1 part of disulphur dichloride, it is formed above that sulphur is heated to its boiling temperature
Overheat sulphur steam enters granulation tower and mixes rapidly with cooling medium disulphur dichloride, recirculating fluidized bed waste heat boiler emission
90 DEG C are cooled to hereinafter, formation disulphur dichloride, sulphur glue misty liquid droplets, are bonded circulating fluidized bed combustion coal boiler fly ash granulated
At the particle constantly grown up, while wrapping up circulating fluidized bed combustion coal boiler fly ash and carrying out surface active, above-mentioned particle growth to it
To after certain diameter, the suspending power that gravity is greater than recirculating fluidized bed waste heat boiler emission falls into material collecting device sealing and protects
It deposits.
Embodiment 3
A kind of volatile organic compound from waste gas hypersober is present embodiments provided, each component parts by weights meter: is followed
100 parts of ring fluidized bed coal-burning boiler flying dust, 5 parts of sulphur, 1.5 parts of disulphur dichloride, sulphur are heated to the above shape of its boiling temperature
At overheat sulphur steam enter granulation tower mix with cooling medium disulphur dichloride, recirculating fluidized bed waste heat boiler emission it is fast
Speed is cooled to 90 DEG C hereinafter, formation disulphur dichloride, sulphur glue misty liquid droplets, are bonded circulating fluidized bed combustion coal boiler fly ash particle
The particle constantly grown up is formed, while wrapping up circulating fluidized bed combustion coal boiler fly ash and carrying out surface active to it, above-mentioned particle is long
Greatly to after certain diameter, the suspending power that gravity is greater than recirculating fluidized bed waste heat boiler emission falls into material collecting device sealing and protects
It deposits.
Embodiment 4
A kind of volatile organic compound from waste gas hypersober is present embodiments provided, each component parts by weights meter: is followed
100 parts of ring fluidized bed coal-burning boiler flying dust, 10 parts of sulphur, 1.5 parts of disulphur dichloride, sulphur are heated to the above shape of its boiling temperature
At overheat sulphur steam enter granulation tower mix with cooling medium disulphur dichloride, recirculating fluidized bed waste heat boiler emission it is fast
Speed is cooled to 90 DEG C hereinafter, formation disulphur dichloride, sulphur glue misty liquid droplets, are bonded circulating fluidized bed combustion coal boiler fly ash particle
The particle constantly grown up is formed, while wrapping up circulating fluidized bed combustion coal boiler fly ash and carrying out surface active to it, above-mentioned particle is long
Greatly to after certain diameter, the suspending power that gravity is greater than recirculating fluidized bed waste heat boiler emission falls into material collecting device sealing and protects
It deposits.
Comparative example 1
A kind of modified activated carbon absorbent and preparation method thereof for low-concentration organic exhaust gas that this comparative example provides, feature
It is: is made from the following raw materials in parts by weight: active carbon 100-120, cerium oxide 2-3, ammonium persulfate 1-2, diatomite 70-80, wood
Diatomite is sent into calcining furnace and is calcined 3-4 hours at 840-880 DEG C by quality 3-4, attapulgite modified 8-10, appropriate amount of water,
It takes out, is added in suitable quantity of water, is heated in 80-90 DEG C together with activated carbon oxidation cerium, lignin, grinding 40-60 minutes, then
Ammonium persulfate is added to stir 1-2 hours, continues to grind, obtains 200-300 mesh slurry, is spray-dried, is mixed with attapulgite modified
It closes uniformly, is sent into heat-treatment furnace, is handled 3-4 hours at 350-380 DEG C, take out.
By " waste gas in fixed source Specifications of Monitoring Technology " (HJ/T 397-2007), " stationary source exhaust gas volatility is organic
Measurement solid phase adsorption-thermal desorption/gas chromatography-mass spectrography of object " (HJ 734-2014) method detects Fujian Jin work machine respectively
The dosage of tool Co., Ltd loading machine Painting Shop exhaust tube pollutant VOCs, embodiment 1-4 and the VOCs adsorbent of comparative example 1
It is by weight 3:1, acquired results are shown in table 1.
Table 1: the performance test results of embodiment 1-4 and the VOCs adsorbent of comparative example 1.
As shown in Table 1, with comparative example 1(VOCs adsorbent in the prior art) compared with, a kind of volatility of the invention has
Machine compound exhaust air hypersober is to VOCs purifying rate all 90% or more, and quite with comparative example 1, adsorption capacity is big, replacement
Period is long, and according to measuring and calculating, cost is only 1/10~1/20 or so of comparative example 1, and energy consumption is only 1/10 or so of comparative example 1.
According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula is changed and is modified.Therefore, the invention is not limited to the specific embodiments disclosed and described above, to of the invention
Some modifications and changes should also be as falling into the scope of the claims of the present invention.In addition, although being used in this specification
Some specific terms, these terms are merely for convenience of description, does not limit the present invention in any way.
Claims (1)
1. a kind of volatile organic compound from waste gas hypersober, it is characterized in that: include circulating fluidized bed combustion coal boiler fly ash,
Sulphur, disulphur dichloride, technical process medium are recirculating fluidized bed waste heat boiler emission；Including following components: recycle stream
Change 100 parts of bed coal-burning boiler flying dust, 5~10 parts of sulphur, 1~1.5 part of disulphur dichloride, component is according to parts by weight；Recycle stream
Changing bed coal-burning boiler flying dust is that the flue dust that circulating fluidized bed combustion coal boiler smoke is carried under one's arms is transported to after dry dust removal apparatus traps
Bulk cement storage tank in particulate matter, circulating fluidized bed combustion coal boiler fly ash enters after dry collector traps and bulk cement storage tank and completely cuts off sky
Gas；Disulphur dichloride is -20~-15 DEG C using temperature, as rapid cooling agent, anti-transforming agent and the recycle stream for preparing sulphur glue
Change bed coal-burning boiler flying dust activating agent；Recirculating fluidized bed waste heat boiler emission is in circulating fluidized bed combustion coal boiler furnace
High-temperature flue gas is after heat-exchange system heat exchange, dry collector is disposed into the discharge tail after waste heat boiler absorption waste heat
Gas；The adsorbent the preparation method comprises the following steps: sulphur, which is heated to its boiling temperature overheat sulphur steam formed above, enters granulation tower
It is mixed with cooling medium disulphur dichloride, recirculating fluidized bed waste heat boiler emission and is rapidly cooled to 90 DEG C hereinafter, forming two
Two sulphur of chlorination, sulphur glue misty liquid droplets, bonding circulating fluidized bed combustion coal boiler fly ash particle form the particle constantly grown up, simultaneously
Package circulating fluidized bed combustion coal boiler fly ash carries out surface active to it, and after above-mentioned particle growth to certain diameter, gravity is big
Material collecting device is fallen into the suspending power of recirculating fluidized bed waste heat boiler emission to be sealed.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6555712B2 (en) * | 2001-03-28 | 2003-04-29 | Indian Institute Of Technology | Process for the preparation of diorganotrisulfide |
| CN104437552A (en) * | 2014-11-21 | 2015-03-25 | 江苏长三角精细化工有限公司 | Toluene chlorination catalyst using activated carbon as carrier |
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2017
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6555712B2 (en) * | 2001-03-28 | 2003-04-29 | Indian Institute Of Technology | Process for the preparation of diorganotrisulfide |
| CN104437552A (en) * | 2014-11-21 | 2015-03-25 | 江苏长三角精细化工有限公司 | Toluene chlorination catalyst using activated carbon as carrier |
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Effective date of registration: 20190425 Address after: 215100 Suli Road, Wuzhong District, Suzhou, Jiangsu Province, No. 63 Applicant after: Suzhou ring Source Environmental Protection Technology Co., Ltd. Address before: 362001 Yuanyuan, 610 Xinmen Street, Licheng District, Fujian Province, and 32 buildings and 2 floors of 1916 Creative Industry Park Applicant before: Yang Song |
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