CN106362574A - Flue gas desulfurization and dust removal scattering tower - Google Patents
Flue gas desulfurization and dust removal scattering tower Download PDFInfo
- Publication number
- CN106362574A CN106362574A CN201611094591.9A CN201611094591A CN106362574A CN 106362574 A CN106362574 A CN 106362574A CN 201611094591 A CN201611094591 A CN 201611094591A CN 106362574 A CN106362574 A CN 106362574A
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- flue gas
- desulfurization
- scattering
- tower
- liquid pool
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/02—Separating dispersed particles from gases, air or vapours by liquid as separating agent by passing the gas or air or vapour over or through a liquid bath
- B01D47/021—Separating dispersed particles from gases, air or vapours by liquid as separating agent by passing the gas or air or vapour over or through a liquid bath by bubbling the gas through a liquid bath
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/96—Regeneration, reactivation or recycling of reactants
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention is mainly applied in a wet-method glue gas desulfurization and dust removal device, and particularly relates to a flue gas desulfurization and dust removal scattering tower which comprises a tower body. An upper bin is sequentially provided with a flue gas outlet, a flue gas demister, an upper layer process water spraying device, a baffling device and a middle layer process water spraying device from top to bottom. The middle bin is provided with a flue gas inlet. A vertical lower layer process water spraying device is arranged at the flue gas inlet. A desulfurization liquid spraying device is arranged below a liquid collecting pool and located in the middle bin. An accident spraying device is arranged below the desulfurization liquid spraying device. A flue gas scattering pipe is arranged below the accident spraying device. A lower bin comprises a desulfurization liquid pool. The upper portion in the desulfurization liquid pool is provided with an oxidation air blower connecting oxygen passing pipe, and the lower portion is provided with a pulse device. The flue gas scattering tower is wide in applicability and adjustable in desulfurization rate; as long as the pressure of a desulfurization booster fan is well selected, the flue gas scattering wet-method desulfurization process can meet the requirements for flue gas emission in different periods of time in China.
Description
Technical field
The present invention relates to a kind of flue gas desulfurization and dedusting scatters tower, it is mainly used in wet flue gas desulfurization and dedusting equipment.
Background technology
Acid rain problem is one of global environmental problem of face of mankind nowadays, coal-fired oxysulfide so producing2And nitrogen
Oxide nox pollution is the major primary thing of China's acid rain.Because the energy resource structure of China is based on coal, in China's electric power work
In industry, thermoelectricity accounts for the 70% about of gross generation always, and coal-fired power plant is the first big polluter of China's atmospheric pollution.To electricity
Factory's smoke pollution is controlled being to realize economic, the social, requirement of harmonious development, is also that performance coal in China reserves are excellent
Gesture, realize the requirement of coal-burning power plant itself sustainable development.Traditional coal fired power plant flue gas desulfurization technique is generally divided into wet method, half-dried
Method and dry desulfurization etc. are several, and wherein Wet Flue Gas Desulfurization Technique is applied the most extensive.In Wet Flue Gas Desulfurization Technique, it is by flue gas
Sulfur dioxide directly with vaporific slurry liquid contacts, so that vaporific serosity and sulfur dioxide is reacted and absorbed, thus reaching desulfurization
Purpose.
At present, the wet process of FGD equipment industrially applied is mainly spray absorber.Original spray absorber skill
The comparison that art has is single, and internal structure is simple, and in addition to spraying layer, no other can improve the device of smoke desulfurization efficiency；Have
In spray section increase, there is serosity reallocation or hold the device of liquid layer, to improve desulfuration efficiency, there is certain effect.Generally
Single spray column, under sulphur coal situation, does not substantially meet environmental requirement.For a lot of coal-burning boilers, because operating mode
Change or other etc. reason, run the single cleaner units such as the electrostatic precipitator of a period of time or sack cleaner and be extremely difficult to country
The now standard of the dust content of execution " fossil-fuel power plant atmospheric pollutant emission standard " (gb13223-2011).Original employing spray column
The desulfurizer of technology is substantially required to transformation and puies forward effect, but single spray tower technology be difficult to meet improved environmental protection will
Ask.For steel industry or other industry, because sulfur content is relatively low, substantially can be met using more single spray tower technology
Environmental requirement, but the desulfurization standard of other industry may be improved for following country and require to consider, also need to develop new taking off
Sulfur technology is to tackle the challenge of following environmental protection standard.Problem faced by desulfurizing fly ash needs is except improving desulfuration efficiency, meeting newly
Standard requires outer；Also taking cost into account to reduce transformation amount on the basis of original desulfurizer, reduce as far as possible and be transformed into
This.
Content of the invention
The technical problem to be solved in the present invention is: provide a kind of gas liquid interfacial area fully, good absorbing effect, and lift environmental protection
The flue gas desulfurization and dedusting scattering tower of effect.
Flue gas desulfurization and dedusting of the present invention scatters tower, and including tower body, tower body includes Shang Cang, Zhong Cang and Xia Cang, middle storehouse
It is uptake flue and tower body between, upper storehouse from top to bottom sets gradually exhanst gas outlet, flue gas demister, upper strata technique Water spray dress
Put, baffle means and middle level technique water spray system, below the technique water spray system of middle level, collecting tank is set, middle storehouse is provided with flue gas
Entrance, is provided with the lower floor's technique water spray system being vertically arranged, upper strata technique water spray system, middle level fresh water (FW) at smoke inlet
Spray equipment and lower floor's technique water spray system are all connected with fresh water (FW) inlet tube, setting doctor solution spray dress below collecting tank
Put, doctor solution spray equipment is located in middle storehouse, be accident spray equipment below doctor solution spray equipment, under accident spray equipment
Side is flue gas scattering tube, and lower storehouse includes desulfurization liquid pool, and desulfurization liquid pool internal upper part is provided with and connects oxidation fan oxygen-supplying tube, and bottom is provided with arteries and veins
Flushing device, is provided with overfall at desulfurization liquid pool upper liquid position, flue gas scattering tube bottom is placed in desulfurization liquid pool, and flue gas scatters tube cavity
Communicate with desulfurization liquid pool.
Lower storehouse is made up of exhaust gases passes and desulfurization liquid pool, and desulfurization liquid pool is divided into reaction zone and zoneofoxidation, reaction zone
In that be substantially carried out is so2Mass transferring in gas phase, zoneofoxidation be mainly to so3 2-Aoxidized.Middle storehouse is by flue entrance, spray
Device, uptake flue and flue gas scattering tube composition, spray equipment, while flue gas being carried out lower the temperature, be humidified, can enter to flue gas
The preliminary desulfurization of row.Upper storehouse is made up of flue gas demister and flue outlet.
Described upper strata technique water spray system and middle level technique water spray system are disposed as two-layer.
Technique tank is removed in described collecting tank one end connection.
Described doctor solution spray equipment includes upper and lower two-layer shower, and shower is respectively communicated with doctor solution circulation pipe, and two
It is respectively provided with circulating pump on doctor solution circulation pipe, and doctor solution communicating pipe is set between two doctor solution circulation pipes, two doctor solution circulations
The end of pipe is all connected with desulfurization liquid pool.
The side setting doctor solution of described tower body supplements pipe, and doctor solution supplements tube inlet and is located at uptake flue.
The medium position of described desulfurization liquid pool connects serosity discharge pipe.
Described pulser includes pulse pump, and pulse pump one end connects the pulse tube being horizontally set in desulfurization liquid pool,
The other end connects pulse connecting tube, and pulse connecting tube is communicated with desulfurization liquid pool.
Leakage fluid dram is arranged on the side wall of described desulfurization liquid pool.
The middle storehouse that boiler smoke initially enters scattering tower is dropped to flue-gas temperature beneficial to chemical reaction by spray equipment
Temperature (completes once desulfurization), flue gas is uniformly distributed in multiple flue gas scattering tubes, during flue gas scattering tube is arranged on simultaneously
The bottom in storehouse is simultaneously connected with lower storehouse, and inserts in the desulfurization liquid pool in lower storehouse.Therefrom storehouse is directly pierced flue gas by flue gas scattering tube
To in the doctor solution in lower storehouse, and gushed to floating through doctor solution in the form of tiny bubble, complete during flue gas floats and gushes
So2Depth absorbing reaction (completing secondary desulfuration)；Flue gas enters upper storehouse by uptake flue；Escape through demister removing part
After the salt fog of ease and moisture, neat stress enters chimney from exhaust pass.
The invention has the beneficial effects as follows:
Because flue gas scattering tower has wide adaptability, the adjustable feature of desulfurization degree, as long as the pressure by desulphurization devices
Choose, flue gas scattering wet desulfurizing process just can meet the requirement to fume emission for the national different periods, can reduce boiler
Power consumption and coal consumption.Scattering desulfurization dust-removing technique feature: reduced investment, operating cost is low；Flue gas scattering Wet Flue Gas Desulfurization Technique is abundant
Inherit the advantage of spray process and Bubbling method, there is the effect of deep desulfuration dedusting.Main due to spray in the system
Purpose is intended merely to carry out decreasing temperature and increasing humidity to flue gas, so its liquid-gas ratio only needs 2, far below the liquid gas of traditional spray process
Spray can attach desulfurization to ratio simultaneously, be not required for the response time of sprayed slurry and flue gas, therefore greatly reduce circulating pump
Potential energy work(to be done, decreases the power consumption of circulating pump.Reduce operating cost.Scattering desulfurizing tower combines at the beginning of during spray column desulfurization
The feature to dispersion phase for the continuous phase when feature of low liquid-gas ratio high desulfurization rate of beginning section and bubble tower desulfurization, desulfuration efficiency is high, fortune
Row low cost.
Brief description
Fig. 1 is the structural representation of the present invention.
In figure: 1, exhanst gas outlet；2nd, flue gas demister；3rd, upper strata technique water spray system；4th, baffle means；5th, liquid collecting
Pond；6th, remove technique tank；7th, doctor solution spray equipment；8th, lower floor's technique water spray system；9th, smoke inlet；10th, flue gas scattering
Pipe；11st, doctor solution circulation pipe；12nd, doctor solution communicating pipe；13rd, circulating pump；14th, serosity discharge pipe；15th, leakage fluid dram；16th, desulfurization
Liquid pool；17th, pulse pump；18th, connect oxidation fan oxygen-supplying tube；19th, doctor solution supplements pipe；20th, accident spray equipment；21st, fresh water (FW)
Inlet tube；22nd, tower body；23rd, middle level technique water spray system；24th, overfall.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is described further:
As shown in figure 1, flue gas desulfurization and dedusting of the present invention scatters tower, including tower body 22, tower body 22 include Shang Cang, in
Storehouse and Xia Cang, are uptake flue between middle storehouse and tower body 22, upper storehouse from top to bottom sets gradually exhanst gas outlet 1, flue gas demister
2nd, upper strata technique water spray system 3, baffle means 4 and middle level technique water spray system 23, under middle level technique water spray system 23
Side's setting collecting tank 5, middle storehouse is provided with smoke inlet 9, is provided with the lower floor's technique water spray system 8 being vertically arranged at smoke inlet 9,
Upper strata technique water spray system 3, middle level technique water spray system 23 and lower floor's technique water spray system 8 all with fresh water (FW) inlet tube
21 are connected, collecting tank 5 lower section setting doctor solution spray equipment 7, and doctor solution spray equipment 7 is located in middle storehouse, doctor solution spray dress
Putting 7 lower sections is accident spray equipment 20, and the lower section of accident spray equipment 20 is flue gas scattering tube 10, and lower storehouse includes desulfurization liquid pool
16, desulfurization liquid pool 16 internal upper part is provided with and connects oxidation fan oxygen-supplying tube 18, and bottom is provided with pulser, at liquid level on desulfurization liquid pool 16
It is provided with overfall 24, flue gas scattering tube 10 bottom is placed in desulfurization liquid pool 16, flue gas scattering tube 10 inner chamber and desulfurization liquid pool 16 phase
Logical.Upper strata technique water spray system 3 and middle level technique water spray system 23 are disposed as two-layer.Work is gone in the connection of collecting tank 5 one end
Skill tank 6.Doctor solution spray equipment 7 includes upper and lower two-layer shower, and shower is respectively communicated with doctor solution circulation pipe 11, two desulfurization
Circulating pump 13 is respectively provided with liquid circulation pipe 11, and doctor solution communicating pipe 12, two doctor solutions are set between two doctor solution circulation pipes 11
The end of circulation pipe 11 is all connected with desulfurization liquid pool 16.The side setting doctor solution of tower body 22 supplements pipe 19, and doctor solution supplements pipe
19 entrances are located at uptake flue.The medium position of desulfurization liquid pool 16 connects serosity discharge pipe 14.Pulser includes pulse pump
17, pulse pump 17 one end connects the pulse tube being horizontally set in desulfurization liquid pool 16, and the other end connects pulse connecting tube, and pulse is even
Adapter is communicated with desulfurization liquid pool 16.Leakage fluid dram 15 is arranged on the side wall of desulfurization liquid pool 16.
The middle storehouse that boiler smoke initially enters scattering tower is dropped to flue-gas temperature beneficial to chemical reaction by spray equipment
Temperature (completes once desulfurization), flue gas is uniformly distributed in multiple flue gas scattering tubes 10, flue gas scattering tube 10 is installed simultaneously
Connect in the bottom in middle storehouse and with lower storehouse, and insert in the desulfurization liquid pool 16 in lower storehouse.Therefrom flue gas scattering tube 10 is passed through in storehouse to flue gas
Directly it is drilled in the doctor solution in lower storehouse, and is gushed to floating through doctor solution in the form of tiny bubble, float, in flue gas, the mistake gushed
So is completed in journey2Depth absorbing reaction (completing secondary desulfuration)；Flue gas enters upper storehouse by uptake flue；Remove through demister
After removing salt fog and the moisture of part escape, neat stress enters chimney from exhaust pass.
Claims (8)
1. a kind of flue gas desulfurization and dedusting scattering tower it is characterised in that: include tower body (22), tower body (22) include Shang Cang, middle storehouse and
Lower storehouse, is uptake flue between middle storehouse and tower body (22), upper storehouse from top to bottom sets gradually exhanst gas outlet (1), flue gas demister
(2), upper strata technique water spray system (3), baffle means (4) and middle level technique water spray system (23), middle level technique Water spray
Setting collecting tank (5) below device (23), middle storehouse is provided with smoke inlet (9), and smoke inlet (9) place is provided with the lower floor being vertically arranged
Technique water spray system (8), upper strata technique water spray system (3), middle level technique water spray system (23) and lower floor's fresh water (FW) spray
Shower device (8) is all connected with fresh water (FW) inlet tube (21), setting doctor solution spray equipment (7) below collecting tank (5), and doctor solution sprays
Shower device (7) is located in middle storehouse, is accident spray equipment (20) below doctor solution spray equipment (7), accident spray equipment (20)
Lower section be flue gas scattering tube (10), lower storehouse includes desulfurization liquid pool (16), and desulfurization liquid pool (16) internal upper part is provided with and connects oxidation fan
Oxygen-supplying tube (18), bottom is provided with pulser, is provided with overfall (24), flue gas scattering tube (10) at the upper liquid level of desulfurization liquid pool (16)
Bottom is placed in desulfurization liquid pool (16), and flue gas scattering tube (10) inner chamber is communicated with desulfurization liquid pool (16).
2. flue gas desulfurization and dedusting according to claim 1 scattering tower it is characterised in that: upper strata technique water spray system (3)
And middle level technique water spray system (23) is disposed as two-layer.
3. flue gas desulfurization and dedusting according to claim 1 scattering tower it is characterised in that: work is gone in the connection of collecting tank (5) one end
Skill tank (6).
4. flue gas desulfurization and dedusting according to claim 1 scattering tower it is characterised in that: doctor solution spray equipment (7) includes
Two-layer shower up and down, shower is respectively communicated with doctor solution circulation pipe (11), two doctor solution circulation pipes (11) is respectively provided with circulation
Setting doctor solution communicating pipe (12), the end of two doctor solution circulation pipes (11) between pump (13), and two doctor solution circulation pipes (11)
All it is connected with desulfurization liquid pool (16).
5. flue gas desulfurization and dedusting according to claim 1 scatter tower it is characterised in that: the side setting desulfurization of tower body (22)
Liquid supplements pipe (19), and doctor solution supplements pipe (19) entrance and is located at uptake flue.
6. flue gas desulfurization and dedusting according to claim 1 scattering tower it is characterised in that: the medium position of desulfurization liquid pool (16)
Connect serosity discharge pipe (14).
7. flue gas desulfurization and dedusting according to claim 1 scattering tower it is characterised in that: pulser includes pulse pump
(17), pulse pump (17) one end connects the pulse tube being horizontally set in desulfurization liquid pool (16), and the other end connects pulse connecting tube,
Pulse connecting tube is communicated with desulfurization liquid pool (16).
8. flue gas desulfurization and dedusting according to claim 1 scattering tower it is characterised in that: set on the side wall of desulfurization liquid pool (16)
Put leakage fluid dram (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611094591.9A CN106362574A (en) | 2016-12-01 | 2016-12-01 | Flue gas desulfurization and dust removal scattering tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611094591.9A CN106362574A (en) | 2016-12-01 | 2016-12-01 | Flue gas desulfurization and dust removal scattering tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106362574A true CN106362574A (en) | 2017-02-01 |
Family
ID=57891960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611094591.9A Pending CN106362574A (en) | 2016-12-01 | 2016-12-01 | Flue gas desulfurization and dust removal scattering tower |
Country Status (1)
| Country | Link |
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| CN (1) | CN106362574A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108295637A (en) * | 2018-03-07 | 2018-07-20 | 北京北清环科环境工程有限公司 | The minimum discharge system and method for de-suphur of kiln fume, dedusting demisting |
| CN108404654A (en) * | 2018-04-02 | 2018-08-17 | 中山市天乙能源有限公司 | A kind of garbage incinerating power plant flue gas purification system |
| CN108993127A (en) * | 2018-08-29 | 2018-12-14 | 华南理工大学 | A kind of spray scattering tower of air distributor structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11151422A (en) * | 1997-11-19 | 1999-06-08 | Ishikawajima Harima Heavy Ind Co Ltd | Chimney integrated type flue gas desulfurizer |
| CN101524620A (en) * | 2009-04-13 | 2009-09-09 | 山西晋丰环保工程设计有限公司 | Segment-based ammonia flue gas desulfurization process and device thereof |
| CN104258719A (en) * | 2014-09-04 | 2015-01-07 | 山东清能创新环保科技有限公司 | Desulfuration, denitration and dust removal (PM2.5 removal) three-in-one technical system for boiler exhaust gas by adopting ammonia method |
| CN206253002U (en) * | 2016-12-01 | 2017-06-16 | 合力泰科技股份有限公司 | Flue gas desulfurization and dedusting scatters tower |
-
2016
- 2016-12-01 CN CN201611094591.9A patent/CN106362574A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11151422A (en) * | 1997-11-19 | 1999-06-08 | Ishikawajima Harima Heavy Ind Co Ltd | Chimney integrated type flue gas desulfurizer |
| CN101524620A (en) * | 2009-04-13 | 2009-09-09 | 山西晋丰环保工程设计有限公司 | Segment-based ammonia flue gas desulfurization process and device thereof |
| CN104258719A (en) * | 2014-09-04 | 2015-01-07 | 山东清能创新环保科技有限公司 | Desulfuration, denitration and dust removal (PM2.5 removal) three-in-one technical system for boiler exhaust gas by adopting ammonia method |
| CN206253002U (en) * | 2016-12-01 | 2017-06-16 | 合力泰科技股份有限公司 | Flue gas desulfurization and dedusting scatters tower |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108295637A (en) * | 2018-03-07 | 2018-07-20 | 北京北清环科环境工程有限公司 | The minimum discharge system and method for de-suphur of kiln fume, dedusting demisting |
| CN108404654A (en) * | 2018-04-02 | 2018-08-17 | 中山市天乙能源有限公司 | A kind of garbage incinerating power plant flue gas purification system |
| CN108993127A (en) * | 2018-08-29 | 2018-12-14 | 华南理工大学 | A kind of spray scattering tower of air distributor structure |
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Effective date of registration: 20171019 Address after: Yiyuan County Economic Development Zone 256100 Shandong city of Zibo province (county Yihe Road No. 1329) Applicant after: Shandong Helitai Chemical Co.,Ltd. Address before: 256100 Yiyuan City, Zibo Province, east wind road, No., No. 36 Applicant before: HOLITECH TECHNOLOGY CO.,LTD. |
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