CN105879660A - VOCs (volatile organic compounds) purification system for waste gas of petrochemical industry - Google Patents
VOCs (volatile organic compounds) purification system for waste gas of petrochemical industry Download PDFInfo
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
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- B01D53/14—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 absorption
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/44—Organic components
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/84—Biological processes
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- B01D2257/708—Volatile organic compounds V.O.C.'s
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- B01D2259/804—UV light
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Abstract
The invention discloses a VOCs (volatile organic compounds) purification system for waste gas of petrochemical industry. The system comprises a waste heat exchanger, a gas overheat protection device, a hot gas mass flow meter, a hybrid gas flow regulation valve, a cloth bag type dust remover, a pulse ultraviolet activation-microorganism degradation reactor, a smoke-gas-water washing purification tower, and an induced draft fan. The system creatively utilizes the suitability and the bioactivity degradation function of a Verticillium lecanii KM9083 strain to high-concentration VOCs, VOCs elements in the waste gas are finally decomposed into H2O and CO2, and the biological degradation efficiency of the strain to the VOCs can meet purification treatment requirements of the industrial waste gas. Meanwhile, the system utilizes an ultraviolet radiation resistance function of a benzophenone-hexamethyl phosphorotriamides combination, and adds the medicament to the Verticillium lecanii KM9083 strain in advance, thereby effectively preventing a biological inhibition function of ultraviolet rays to the strain.
Description
Technical field
The present invention relates to the VOCs cleaning system of a kind of petrochemical industry waste gas, belong to the exhaust-gas treatment field in environmental conservation.
Background technology
VOCs is the english abbreviation of VOC (volatile organic compounds).Typical VOCs emission source can be divided into anthropogenic discharge source (including stationary source and moving source) and natural emission source (including biogenic and abiotic source) two classes, wherein based on anthropogenic discharge source, mostly cause for the production process of petrochemical industry related industry, product consumption behavior and motor-vehicle tail-gas.The complicated component of VOCs, the harm to human body is big, and the special odor being had can cause all senses of discomfort of human body, and has toxicity and zest.Known many VOCs have neurotoxicity, kidney and hepatotoxicity, even have carcinogenesis, can damage blood constituent and cardiovascular system, cause gastrointestinal disturbance, induction immune system, hormonal system and disease of hematopoietic system, cause metabolic deficiency.In air, multiple VOCs can simultaneously act on human body, produces accumulative effect, and its extent of injury is greatly increased.
Traditional VOCs controls technology and is basically divided into two big classes: recovery technology and destruction technology.Recovery technology is the character according to VOCs itself, by physical method, under certain temperature and pressure, uses absorption and sorption agent and permoselective membrane etc. to realize the separation of VOCs, mainly includes absorption process, absorption method, condensation method and membrane separation process.Technology of destroying is then to use chemistry or biological method, makes VOCs gas molecule be changed into water and the carbon dioxide of little molecule, mainly includes combustion method and bioanalysis.
(1) absorption process: the method for absorption process purifying VOCs is to utilize stripping liquid to process mixed gas, one or more gas components in mixed gas are dissolved in liquid, or with the component generation selection chemical reaction in absorbing liquid, remove one of which or the process of several gas, thus reach to control a kind of method of atmospheric pollution.The method is suitable for the process containing VOCs waste gas of atm number, intermediate concentration.
(3) absorption method: absorption method is the gaseous mixture utilizing porous solid sorbent treatment containing VOCs, utilize unbalanced chemical bond force or the molecular attraction of the surface of solids, one or more components therein are made to concentrate on the surface of solids, to reach the purpose separated.The conventional active charcoal of adsorbent, NACF, activated alumina, molecular sieve and zeolite etc..
(3) combustion method: VOCs is converted into the process of the inorganic matter that carbon dioxide, water and hydrogen chloride etc. are nontoxic or toxicity is little by combustion method, and be referred to as burning the method for purification, and its chemical action is mainly the thermal decomposition effect under combustion oxidation and high temperature.The method is applicable to administer harmful gas that is flammable or that can decompose in the case of a high temperature.The advantage of combustion method is that clearance is higher, typically more than 95%；Shortcoming is that direct combustion method is susceptible to blast, wastes heat energy and is easily generated secondary pollution, and flame combustion method operating cost is higher.
(4) condensation method: condensation method is to utilize VOCs to have different saturated vapor pressures under different temperature and pressures, by reducing temperature and increasing pressure, makes the pollutant being in steam condition condense out so that it is be purified and reclaim.The method advantage is that apparatus and process is simple, and energy consumption is low, recyclable useful component；Shortcoming is to be not suitable for processing the organic gas of low concentration, requires entrance VOCs strict, and when chilling temperature is relatively low, power consumption is bigger.
(5) bioanalysis: bioanalysis is under suitable environmental condition, utilizes the vital movement of microorganism that the harmful substance in VOCs gas is transformed into simple inorganic matter (CO2、H2And the process of cellular material etc. O).The method of common Biochemical method VOCS has: zinc cation method, Biological fitler method and biological island.The advantage of bioanalysis is that clearance is high, small investment, and equipment is simple, and operating cost is low, less formation secondary pollution, applied range；Shortcoming is that microorganism is higher to environmental requirement, and crushing is relatively big, and capacity of resisting impact load is poor, and equipment volume is big, is not suitable for the removal of high halogen compounds.
(6) membrane separation process: membrane separation process is to utilize under the promotion of pressure differential, and the speed of air penetrating film is different, thus the process that admixture of gas is separated.The advantage of membrane separation process is that selectivity is good, strong adaptability, and energy consumption is low, without phase-state change, and recyclable useful component；Shortcoming is that investment is big, strong to the dependency of film；Requiring higher to the granule surface contral of film, membrane separation device operation requires height.
At present, the organic waste gas treatment method used both at home and abroad includes absorption and sorption, condenses, burns and the methods described above such as biotechnology, but it all exists the shortcomings such as investment is big, cycle length, operating cost are high, and treatment effect is also difficult to meet the emission request of increasingly stringent.For this reason, it may be necessary to find new method and approach to solve this difficult problem.
Summary of the invention
In order to solve problems present in prior art; the invention provides a kind of petrochemical industry waste gas except VOCs cleaning system, this system include residual-heat exchanger, gas superheat protection device, thermal type gas quality flow meter, mixed gas flow regulate valve, fiber bag precipitator, pulsed UV activation-microbial degradation reactor, gas fume washing purifying column, air-introduced machine；nullWherein，Petrochemical industry waste gas containing VOCs enters residual-heat exchanger by gas piping，Overheated waste gas is made to be lowered the temperature and stablize at this through heat exchange action，And the after-heat obtained is available for utilizing，The outlet of residual-heat exchanger connects gas superheat protection device by gas piping，Its effect is when residual-heat exchanger fault or the EGT after heat exchange remain unchanged too high，Can temporarily disconnected gas circuit，Play the effect of protection back-end processing device，The outlet of gas superheat protection device connects thermal type gas quality flow meter by gas piping，Can be to exhaust gas flow、The information such as flow velocity carry out real-time monitoring record，The outlet of thermal type gas quality flow meter connects mixed gas flow regulation valve by gas piping，The actual concentrations of VOCs in waste gas is adjusted by the method importing air，And waste gas is diluted accurately cooling，The outlet of mixed gas flow regulation valve connects fiber bag precipitator by gas piping，The particulate pollutant in waste gas is removed at this，Prevent abrasion or block back-end processing device，The outlet of fiber bag precipitator connects pulsed UV activation-microbial degradation reactor by gas piping，The outlet of pulsed UV activation-microbial degradation reactor connects gas fume washing purifying column by gas piping，At this, waste gas after processing is carried out further water washing cleaning and cooling，The outlet of gas fume washing cooling tower connects air-introduced machine by gas piping，The outlet of air-introduced machine connects atmospheric environment by gas piping；Wherein, pulsed UV activation-microbial degradation reactor is made up of hard rustless steel, its left upper portion is provided with air intake valve, lower right side is provided with drain tap, 1 pulsed uviol lamp is respectively installed on reactor arranged on left and right sides wall, reactor bottom is provided with 1 driving motor, 1 set rustless steel hollow shaft is connected on it, porous catheter it is filled with inside rustless steel hollow shaft, porous catheter is connected with the textile porous fibre bar being fixed on outside rustless steel hollow shaft, further, porous catheter is also connected with the bacterium solution groove being installed on reactor head；nullWaste gas containing VOCs enters inside reactor by being positioned at the air intake valve of pulsed UV activation-microbial degradation reactor upper left quarter，It is now placed in reactor left、Pulsed ultraviolet lamp on right two side is opened，Can be with the working method of pulsed，Intermittent to inside reactor radiation ultraviolet，Simultaneously，The driving motor being positioned at reactor bottom is opened，The rustless steel hollow shaft being positioned at reactor central authorities is driven to start to rotate with certain rotating speed，The some textile porous fibre bar being fixed on rustless steel hollow shaft has been got rid of under the influence of centrifugal force，Occur sufficiently to contact with inside reactor waste gas，On textile porous fibre bar, the Verticillium lecanii KM9083 bacterial strain of attachment is under pulsed ultraviolet irradiates the activation ultraviolet protection effect with benzophenone-HMPA mixture，High efficiency biological Repiration can occur，VOCs composition in waste gas is finally decomposed to H2O and CO2, the waste gas after biodegradation purified treatment is discharged reactor by being positioned at the drain tap of pulsed UV activation-microbial degradation reactor right lower quadrant, is entered next treatment process；
Wherein, it is installed in the bacterium solution groove of reactor head and stores Verticillium lecanii liquid and the mixed solution of benzophenone-HMPA mixture, simultaneously, porous catheter it is filled with inside rustless steel hollow shaft, and be connected with bacterium solution groove, microbial degradation reaction can be made persistently to be carried out by capillary conduction by above-mentioned mixed solution conduction to each textile porous fibre bar.
The working pressure range of its pulsed UV activation-microbial degradation reactor is 0.03 ~ 0.70MPa, and operating temperature range is 20 ~ 42 DEG C, and dischargeable capacity is 260m3。
Its pulsed UV activation-microbial degradation reactor, the running voltage of pulsed ultraviolet lamp is 25V, and power is 45W, and its luminescent spectrum energy focuses primarily upon at 340nm wavelength, and average life was up to 2000 hours.
Its pulsed UV activation-microbial degradation reactor, textile porous fibre strip adoption long-staple cotton makes, and fibre length is more than 33mm, and line density is 7500 public left and right, and strength is more than 5.2cN.
Waste gas after being processed by native system, the removal efficiency of its VOCs is up to 99.8%.
It is an advantage of the current invention that:
(1) native system has broken away from existing industrial waste gas VOCs governance model, creative make use of Verticillium lecanii liquid to the adaptability of higher concentration VOCs and biological activity Degradation thereof, under conditions of being used in combination pulsed ultraviolet irradiation activation, above-mentioned bacterial strains can play highly efficient VOCs Degradation, and it can meet the purified treatment requirement of industrial waste gas to the biodegradation usefulness of VOCs.The method is one processing method the most targetedly, and its treatment effeciency can reach 98.8%.
(2) native system takes full advantage of the ultra-violet radiation resisting protective action of benzophenone and HMPA mix reagent, it is added in advance to bacterial strain, can effectively prevent the ultraviolet biological inhibition effect to above-mentioned bacterial strains, thoroughly solve the technical barrier that mushroom microorganism cannot be survived under ultraviolet irradiates.
(3) native system have employed textile porous fibre as Strain Vector, on the one hand possesses good liquid conductive performance, strain solution can be made to be uniformly distributed；On the other hand, it is also possible to prevent the generation of electrostatic, the danger of the VOCs gas burst caused by electrostatic cremate has fundamentally been stopped.
(4) native system technology path is advanced, and occupation area of equipment is less, and treatment effect is good, and operation expense is the lowest, is conducive to popularization and application on a large scale.
Accompanying drawing explanation
Fig. 1 is the equipment schematic diagram of the present invention.
In figure: 1-residual-heat exchanger, 2-gas superheat protection device, 3-thermal type gas quality flow meter, 4-mixed gas flow regulation valve, 5-fiber bag precipitator, 6-pulsed UV activation-microbial degradation reactor, 7-gas fume washing purifying column, 8-air-introduced machine
Fig. 2 is the schematic diagram of pulsed UV activation-microbial degradation reactor.
61-air intake valve, 62-pulsed ultraviolet lamp, 63-cotton textiles porous fibre bar, 64-rustless steel hollow shaft, 65-porous catheter, 66-bacterium solution groove, 67-drive motor, 68-drain tap
Detailed description of the invention
As shown in Figure 1; petrochemical industry waste gas except VOCs cleaning system, this system includes residual-heat exchanger 1, gas superheat protection device 2, thermal type gas quality flow meter 3, mixed gas flow regulation valve 4, fiber bag precipitator 5, pulsed UV activation-microbial degradation reactor 6, gas fume washing purifying column 7, air-introduced machine 8 etc.；nullWherein，Petrochemical industry waste gas containing VOCs enters residual-heat exchanger 1 by gas piping，Overheated waste gas is made to be lowered the temperature and stablize at this through heat exchange action，And the after-heat obtained is available for utilizing，The outlet of residual-heat exchanger 1 connects gas superheat protection device 2 by gas piping，Its effect is when residual-heat exchanger 1 fault or the EGT after heat exchange remain unchanged too high，Can temporarily disconnected gas circuit，Play the effect of protection back-end processing device，The outlet of gas superheat protection device 2 connects thermal type gas quality flow meter 3 by gas piping，Can be to exhaust gas flow、The information such as flow velocity carry out real-time monitoring record，The outlet of thermal type gas quality flow meter 3 connects mixed gas flow regulation valve 4 by gas piping，The actual concentrations of VOCs in waste gas is adjusted by the method importing air，And waste gas is diluted accurately cooling，The outlet of mixed gas flow regulation valve 4 connects fiber bag precipitator 5 by gas piping，The particulate pollutant in waste gas is removed at this，Prevent abrasion or block back-end processing device，The outlet of fiber bag precipitator 5 connects pulsed UV activation-microbial degradation reactor 6 by gas piping，The outlet of pulsed UV activation-microbial degradation reactor 6 connects gas fume washing purifying column 7 by gas piping，At this, waste gas after processing is carried out further water washing cleaning and cooling，The outlet of gas fume washing cooling tower 7 connects air-introduced machine 8 by gas piping，The outlet of air-introduced machine 8 connects atmospheric environment by gas piping；Wherein, pulsed UV activation-microbial degradation reactor 6 is made up of hard rustless steel, its left upper portion is provided with air intake valve 61, lower right side is provided with drain tap 68, reactor is left, 1 pulsed uviol lamp 62 is respectively installed on right two side, reactor bottom is provided with 1 driving motor 67, 1 set rustless steel hollow shaft 64 is connected on it, rustless steel hollow shaft 64 is internal is filled with porous catheter 65, porous catheter 65 is connected with the textile porous fibre bar 63 being fixed on outside rustless steel hollow shaft 64, and, porous catheter 65 is also connected with the bacterium solution groove 66 being installed on reactor head；nullWaste gas containing VOCs enters inside reactor by being positioned at the air intake valve 61 of pulsed UV activation-microbial degradation reactor 6 upper left quarter，It is now placed in reactor left、Pulsed ultraviolet lamp 62 on right two side is opened，Can be with the working method of pulsed，Intermittent to inside reactor radiation ultraviolet，Simultaneously，The driving motor 67 being positioned at reactor bottom is opened，The rustless steel hollow shaft 64 being positioned at reactor central authorities is driven to start to rotate with certain rotating speed，The some textile porous fibre bar 63 being fixed on rustless steel hollow shaft 64 has been got rid of under the influence of centrifugal force，Occur sufficiently to contact with inside reactor waste gas，On textile porous fibre bar 63, the Verticillium lecanii of attachment is under pulsed ultraviolet irradiates the activation ultraviolet protection effect with benzophenone-HMPA mixture，High efficiency biological Repiration can occur，VOCs composition in waste gas is finally decomposed to H2O and CO2, the waste gas after biodegradation purified treatment is discharged reactor by being positioned at the drain tap 68 of pulsed UV activation-microbial degradation reactor 6 right lower quadrant, is entered next treatment process；Wherein, it is installed in the bacterium solution groove 66 of reactor head and stores Verticillium lecanii KM9083 bacterial strain and the mixed solution of benzophenone-HMPA mixture, simultaneously, rustless steel hollow shaft 64 is internal is filled with porous catheter 65, and be connected with bacterium solution groove 66, microbial degradation reaction can be made persistently to be carried out by capillary conduction by above-mentioned mixed solution conduction to each textile porous fibre bar 63；Wherein, the working pressure range of pulsed UV activation-microbial degradation reactor 6 is 0.03 ~ 0.70MPa, and operating temperature range is 20 ~ 42 DEG C, and dischargeable capacity is 260m3；Wherein, pulsed UV activation-microbial degradation reactor 6, the running voltage of its pulsed ultraviolet lamp 62 is 25V, and power is 45W, and its luminescent spectrum energy focuses primarily upon at 340nm wavelength, and average life was up to 2000 hours；Wherein, pulsed UV activation-microbial degradation reactor 6, its textile porous fibre bar 63 uses long-staple cotton to make, and fibre length is more than 33mm, and line density is 7500 public left and right, and strength is more than 5.2cN.
Waste gas after being processed by native system, the removal efficiency of its VOCs is up to 99.8%.
Claims (6)
1. the VOCs cleaning system of a petrochemical industry waste gas; it is characterized in that, this system includes residual-heat exchanger, gas superheat protection device, thermal type gas quality flow meter, mixed gas flow regulation valve, fiber bag precipitator, pulsed UV activation-microbial degradation reactor, gas fume washing purifying column, air-introduced machine etc.；Wherein, petrochemical industry waste gas containing VOCs enters residual-heat exchanger by gas piping, the outlet of residual-heat exchanger connects gas superheat protection device by gas piping, the outlet of gas superheat protection device connects thermal type gas quality flow meter by gas piping, the outlet of thermal type gas quality flow meter connects mixed gas flow regulation valve by gas piping, the outlet of mixed gas flow regulation valve connects fiber bag precipitator by gas piping, the outlet of fiber bag precipitator connects pulsed UV activation-microbial degradation reactor by gas piping, the outlet of pulsed UV activation-microbial degradation reactor connects gas fume washing purifying column by gas piping, the outlet of gas fume washing purifying column connects air-introduced machine by gas piping, the outlet of air-introduced machine connects atmospheric environment by gas piping；Wherein, pulsed UV activation-microbial degradation reactor left upper portion is provided with air intake valve, lower right side is provided with drain tap, 1 pulsed uviol lamp is respectively installed on reactor arranged on left and right sides wall, reactor bottom is provided with 1 driving motor, 1 set rustless steel hollow shaft is connected on it, porous catheter it is filled with inside rustless steel hollow shaft, porous catheter is connected with the textile porous fibre bar being fixed on outside rustless steel hollow shaft, further, porous catheter is also connected with the bacterium solution groove being installed on reactor head.
nullThe VOCs cleaning system of petrochemical industry waste gas the most according to claim 1，It is characterized in that，Waste gas containing VOCs enters inside reactor by being positioned at the air intake valve of pulsed UV activation-microbial degradation reactor upper left quarter，It is now placed in reactor left、Pulsed ultraviolet lamp on right two side is opened，Can be with the working method of pulsed，Intermittent to inside reactor radiation ultraviolet，The driving motor being simultaneously positioned at reactor bottom is opened，The rustless steel hollow shaft being positioned at reactor central authorities is driven to start to rotate with certain rotating speed，The some textile porous fibre bar being fixed on rustless steel hollow shaft has been got rid of under the influence of centrifugal force，Occur sufficiently to contact with inside reactor waste gas，On textile porous fibre bar, the Verticillium lecanii of attachment is under pulsed ultraviolet irradiates the activation ultraviolet protection effect with benzophenone-HMPA mixture，High efficiency biological Repiration can occur，VOCs composition in waste gas is finally decomposed to H2O and CO2, the waste gas after biodegradation purified treatment is discharged reactor by being positioned at the drain tap of pulsed UV activation-microbial degradation reactor right lower quadrant, is entered next treatment process.
The VOCs cleaning system of petrochemical industry waste gas the most according to claim 1, it is characterized in that, it is installed in the bacterium solution groove of reactor head and stores Verticillium lecanii liquid and the mixed solution of benzophenone-HMPA mixture, it is filled with porous catheter inside rustless steel hollow shaft simultaneously, and be connected with bacterium solution groove, by capillary conduction by above-mentioned mixed solution conduction to each textile porous fibre bar, microbial degradation reaction is made persistently to be carried out.
The VOCs cleaning system of petrochemical industry waste gas the most according to claim 1, it is characterised in that the working pressure range of pulsed UV activation-microbial degradation reactor is about 0.03 ~ 0.70MPa, operating temperature range is 20 ~ 42 DEG C, and dischargeable capacity is 260m3。
The VOCs cleaning system of petrochemical industry waste gas the most according to claim 1, it is characterized in that, the running voltage of the pulsed ultraviolet lamp of pulsed UV activation-microbial degradation reactor is 25V, power is 45W, its luminescent spectrum energy focuses primarily upon at 340nm wavelength, and average life was up to 2000 hours.
The VOCs cleaning system of petrochemical industry waste gas the most according to claim 1, it is characterized in that, the textile porous fibre strip adoption long-staple cotton of pulsed UV activation-microbial degradation reactor is made, and fibre length is more than 33mm, line density is 7500 public left and right, and strength is more than 5.2cN.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610481013.4A CN105879660B (en) | 2016-06-28 | 2016-06-28 | A kind of VOCs cleaning systems of petrochemical industry waste gas |
| CN201711270795.8A CN107837676B (en) | 2016-06-28 | 2016-06-28 | A kind of VOCs purification system of petrochemical industry exhaust gas |
| CN201711271626.6A CN107854995B (en) | 2016-06-28 | 2016-06-28 | A kind of VOCs purification system of petrochemical industry exhaust gas |
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| CN201610481013.4A CN105879660B (en) | 2016-06-28 | 2016-06-28 | A kind of VOCs cleaning systems of petrochemical industry waste gas |
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| CN201711270795.8A Division CN107837676B (en) | 2016-06-28 | 2016-06-28 | A kind of VOCs purification system of petrochemical industry exhaust gas |
| CN201711271626.6A Division CN107854995B (en) | 2016-06-28 | 2016-06-28 | A kind of VOCs purification system of petrochemical industry exhaust gas |
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| CN105879660B CN105879660B (en) | 2018-01-09 |
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| CN201610481013.4A Active CN105879660B (en) | 2016-06-28 | 2016-06-28 | A kind of VOCs cleaning systems of petrochemical industry waste gas |
| CN201711271626.6A Active CN107854995B (en) | 2016-06-28 | 2016-06-28 | A kind of VOCs purification system of petrochemical industry exhaust gas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111135672A (en) * | 2019-01-06 | 2020-05-12 | 史光辉 | Environmental protection treatment process for tar smoke |
| WO2020117035A1 (en) | 2018-12-04 | 2020-06-11 | Monroy Sampieri Carlos | Improved device for removing volatile organic compounds |
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| KR20140000596A (en) * | 2012-06-25 | 2014-01-03 | (주)태린 | Odor clearing system using plasma |
| CN204469539U (en) * | 2015-01-15 | 2015-07-15 | 无锡西玖环保科技有限公司 | A kind of self-cleaning photocatalytic oxidation VOCs cleaning equipment |
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| WO2020117035A1 (en) | 2018-12-04 | 2020-06-11 | Monroy Sampieri Carlos | Improved device for removing volatile organic compounds |
| CN111135672A (en) * | 2019-01-06 | 2020-05-12 | 史光辉 | Environmental protection treatment process for tar smoke |
Also Published As
| Publication number | Publication date |
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| CN107854995A (en) | 2018-03-30 |
| CN107837676B (en) | 2019-03-15 |
| CN107854995B (en) | 2019-03-22 |
| CN105879660B (en) | 2018-01-09 |
| CN107837676A (en) | 2018-03-27 |
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Denomination of invention: VOCs (volatile organic compounds) purification system for waste gas of petrochemical industry Effective date of registration: 20190617 Granted publication date: 20180109 Pledgee: Agricultural Bank of China Limited by Share Ltd Jinhua Economic Development Zone Branch Pledgor: Jinhua Huadong Environmental Protection Technology Co., Ltd. Registration number: 2019330000163 |
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