CN207605529U - A kind of bituminous mixing plant emission-control equipment - Google Patents
A kind of bituminous mixing plant emission-control equipment Download PDFInfo
- Publication number
- CN207605529U CN207605529U CN201721491975.4U CN201721491975U CN207605529U CN 207605529 U CN207605529 U CN 207605529U CN 201721491975 U CN201721491975 U CN 201721491975U CN 207605529 U CN207605529 U CN 207605529U
- Authority
- CN
- China
- Prior art keywords
- dirt pocket
- exhaust gas
- mixing plant
- control equipment
- bituminous mixing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The utility model discloses a kind of bituminous mixing plant emission-control equipments, its drip irrigation device includes body, the dedusting mechanism being set in body, the internal body forms electrostatic room, dirt pocket and desulfurization chamber using two mounting plate intervals, it is fixedly installed electrostatic precipitator in the electrostatic room, it is fixedly installed dedusting mechanism in the dirt pocket, desulfurization mechanism is fixedly installed in the desulfurization chamber；When handling exhaust gas, exhaust gas passes sequentially through electrostatic precipitator, dedusting mechanism and desulfurization mechanism.It can be to tar, dust, sulfur dioxide, the nitrogen oxide in pitch exhaust gas（NOx）Equal gases are gone so that treated, and exhaust gas is smaller to human body, environmental injury, meets national standard.
Description
Technical field
The utility model is related to dedusting air cleaning apparatus fields, more specifically, it relates to which a kind of bituminous mixing plant is useless
Flash Gas Compression Skid System.
Background technology
Bituminous mixing plant is one kind needs indispensability to be used to set for building highway, standard highway, municipal road etc.
It is standby comprising feed proportioning system, drying system, combustion system, hot material promotion, vibrating screen, hot material storage warehouse, weigh stirring system,
Asphalt feeding system, powder supplying system, dust pelletizing system, finished product bin and control system etc..
When using bituminous mixing plant, stirred by feed proportioning system, drying system, combustion system, vibrating screen, weighing in raw material
During mixing system, a large amount of bitumen flue gas, the existing pitch volatile component complex at being grouped as of bitumen flue gas will produce
The solid and liquid particle condensed into, and have the organic matter of vapor state, partial organic substances are high molecular polymers, can be to ring
It causes seriously to pollute in border.Contain gas chromatography, including carbocyclic ring hydrocarbon, cyclic hydrocarbon derivative and other compounds in flue gas, has many
To the harmful effect of health of human body, glance coal contains a variety of multiring aromatic hydrocarbon substances such as BaP, benzanthracene, carbazole, and mostly
It is carcinogenic and strong carcinogen, grain size is mostly between 0.1~1.0 μm, minimum only 0.01 μm, maximum about 10.0 μm, especially
It is a variety of carcinogens for representative with 3,4- BaPs.Its main path being detrimental to health is attached to 8 um or less
Floating dust on, by respiratory tract by suction human body.
In combustion system in bituminous mixing plant, fuel is mostly coal, and exhaust emission is mainly sulfur dioxide, an oxidation
Nitrogen, nitrogen dioxide and particulate matter etc..
Existing bituminous mixing plant is dusted by using dust settling pocket, and the existing notification number that can refer to is
The Chinese patent document of CN205619348U, it discloses a kind of bitumen flue gas processing units, are characterized in that：Including processing
Babinet is respectively arranged with motor and burner in the left and right ends of processing babinet, combuster, exhaust gas is arranged in treatment box body
Bag filter is provided with behind combustion chamber, in actual use, although can be fired to the organic matter in exhaust gas
It burns, still, in real process, exhaust gas burns again after combustion system, can not be well by the coke in exhaust gas
Oil etc. is removed, meanwhile, which is not provided with to sulfur dioxide, the nitrogen oxide in exhaust gas（NOx）And particle
Object etc. removes the gred.
Utility model content
In view of the deficienciess of the prior art, the purpose of this utility model is to provide bituminous mixing plant exhaust-gas treatment dresses
It sets, it can be to tar, dust, sulfur dioxide, the nitrogen oxide in pitch exhaust gas（NOx）Equal gases are gone so that place
Exhaust gas after reason is smaller to human body, environmental injury, meets national standard.
To achieve the above object, the utility model provides following technical solution：
A kind of bituminous mixing plant emission-control equipment, including body, the dedusting mechanism being set in body, in the body
Portion forms electrostatic room, dirt pocket and desulfurization chamber using two mounting plate intervals, and electrostatic precipitation is fixedly installed in the electrostatic room
Device is fixedly installed dedusting mechanism in the dirt pocket, desulfurization mechanism is fixedly installed in the desulfurization chamber；In processing exhaust gas
When, exhaust gas passes sequentially through electrostatic precipitator, dedusting mechanism and desulfurization mechanism.
By using above-mentioned technical proposal, by dividing electrostatic room, dirt pocket and the desulfurization chamber of setting, energy in body
It is enough that tar removing, dedusting, removing and harmful gas are carried out to exhaust gas respectively, so that pitch exhaust gas is discharged into air after purification
In, it is smaller to be injured caused by Man ＆ Nature.
Preferably, the electrostatic room and being fixedly installed the dust accumulation being connected to the electrostatic room on the downside of electrostatic precipitator
Case one, level is plugged with drawer one in the dust deposited case one.
By using above-mentioned technical proposal, by the dust deposited case one being arranged on the downside of electrostatic precipitator and it is plugged on product
Drawer one in dirt case one, when exhaust gas enters in electrostatic room, heavier dust, tar etc. can be fallen in dust deposited case one, be led to
Dust deposited case can be opened using drawer by way of pull by crossing, to clear up dust.
Preferably, the dedusting mechanism includes being arranged at intervals on the indoor multiple filter screens of dedusting, on the downside of dirt pocket and in
Each filter screen is both provided with the dust deposited case two being connected to dirt pocket close to air inlet side.
By using above-mentioned technical proposal, by the indoor multiple filter screens of spaced dedusting, can to exhaust gas into
Row is dusted by different level so that and dedusting is more thorough, meanwhile, dust is collected by dust deposited case two and is removed.
Preferably, the filter screen is obliquely installed, with dirt pocket bottom and close at an acute angle into exhaust gas side.
By using above-mentioned technical proposal, pass through the filter screen being obliquely installed so that dust is not easy heap when waste gas dedusting
Product is on filter screen, so that filter screen will not block easily, so that dust removing effects are preferable.
Preferably, multiple filter screens are sequentially reduced by the lateral outlet side hole of air inlet.
By using above-mentioned technical proposal, by the way that the hole of filter screen to be sequentially reduced, dust can be removed with layering, made
It is higher and more pure to obtain chalk dust removing efficiency.
Preferably, side of the dirt pocket far from dust deposited case two offers elongated slot, offers and be used in the dirt pocket
The mounting groove of the filter screen plugged and fixed.
By using above-mentioned technical proposal, by the elongated slot of setting, mounting groove filter screen is removably mounted at
In dirt pocket, it can be cleaned after a period of use in filter screen, keep its dust removal by filtration effect preferable.
Preferably, the desulfurization mechanism includes the ponding storehouse for being fixed at desulfurization chamber bottom, is fixed above ponding storehouse
It is provided with the sprayed tank being connected to ponding storehouse and the water pump for the solution in the ponding storehouse to be pumped into sprayed tank is set,
It is fixedly arranged at the upper side nozzle in the sprayed tank, the exhaust gas is connected to inner cavity by sparge pipe lower wall, in the spray
It is provided with escape pipe derived from gas in the sprayed tank on the upside of tank.
By using above-mentioned technical proposal, pass through the ponding storehouse of setting, sprayed tank and the nozzle being arranged in sprayed tank
Deng, it, can be easy by using nozzle basin after exhaust gas carries out in sprayed tank, exhaust gas is handled so that exhaust gas progress desulfurization,
Denitration process, so that exhaust gas is more pure.
Preferably, liquid is hypochlorite and presses the mixed solution of chlorate in the ponding storehouse.
By using above-mentioned technical proposal, the mixed solution desulphurization and denitration effect of hypochlorite and pressure chlorate is preferable, and
Industrial low cost, waste liquid handlability are high.
In conclusion the utility model has the advantages that：
1, by dividing electrostatic room, dirt pocket and the desulfurization chamber of setting in body, exhaust gas can be devoked respectively
Oil, dedusting, removing and harmful gas, so that pitch exhaust gas is discharged into after purification in air, to be made to Man ＆ Nature
At injury it is smaller；
2, by the indoor multiple filter screens of spaced dedusting, exhaust gas can be dusted by different level, is made
It is more thorough to obtain dedusting, meanwhile, dust is collected by dust deposited case two and is removed；
3, the filter screen by being obliquely installed so that dust is not easy to be deposited on filter screen when waste gas dedusting, to make
Obtaining filter screen will not block easily, so that dust removing effects are preferable.
Description of the drawings
Fig. 1 is a kind of overall structure diagram of bituminous mixing plant emission-control equipment；
Fig. 2 is a kind of half-section diagram of bituminous mixing plant emission-control equipment；
Fig. 3 is a kind of sectional view of prominent dedusting mechanism in bituminous mixing plant emission-control equipment；
Fig. 4 is a kind of structural schematic diagram of prominent filter screen in bituminous mixing plant emission-control equipment；
Fig. 5 is a kind of enlarged drawing of A structures in prominent Fig. 3 in bituminous mixing plant emission-control equipment；
Fig. 6 is a kind of sectional view of prominent desulfurization mechanism in bituminous mixing plant emission-control equipment.
Reference numeral：1, body；11, supporting rack；12, inlet cylinder；13, gas outlet；14, mounting plate；141, through-hole；15、
Electrostatic room；16, dirt pocket；161, elongated slot；162, mounting groove；163, dust mouth；17, desulfurization chamber；2, electrostatic precipitator；21, electric
Pole plate；22, dust deposited case one；221, drawer one；3, dedusting mechanism；31, filter screen；311, filter screen one；312, filter screen two；
313, filter screen three；314, frame；315, fixed plate；3151, gasket；32, dust deposited case two；321, drawer two；4, desulfurizing machine
Structure；41, ponding storehouse；411, drain pipe；412, inlet tube；413, ball valve；42, sprayed tank；421, air inlet pipe；422, drainpipe；
423, escape pipe；43, water pump；431, water inlet pipe；44, nozzle；5, suction ventilator；A, angle.
Specific implementation mode
The utility model is described in further detail below in conjunction with attached drawing, wherein the identical attached drawing of identical parts
Label indicates.It should be noted that word "front", "rear" used in the following description, "left", "right", "up" and "down", " bottom
Face " and " top surface " refer to that the direction in attached drawing, word "inner" and "outside" are referred respectively to towards or away from particular elements geometry
The direction at center.
A kind of bituminous mixing plant emission-control equipment, as depicted in figs. 1 and 2, including body 1, be set to it is quiet in body 1
Electric precipitator 2, dedusting mechanism 3 and desulfurization mechanism 4, wherein exhaust gas passes sequentially through the coke in the removing exhaust gas of electrostatic precipitator 2
Oil particles, after be dusted by dedusting mechanism 3, most afterwards through desulfurizing machine structure 4 carry out desulphurization and denitration processing so that the gas of discharge
Body reaches discharge standard.
Body 1 is rectangular, is fixedly installed on the ground by the supporting rack 11 of setting, length direction both ends are fixed respectively
It is provided with inlet cylinder 12 and gas outlet 13, three is partitioned by three pieces of mounting plates 14 being fixedly installed vertically inside body 1
Chamber, respectively electrostatic room 15, dirt pocket 16 and desulfurization chamber 17, and all offer through-hole on the mounting plate 14 between three chambers
141, so that adjacent two chambers connection, meanwhile, it is connected with suction ventilator 5 in one end of gas outlet 13, so that useless
Gas can pass through entire emission-control equipment.
Electrostatic precipitator 2 is mounted in electrostatic room 15, including is vertically arranged and is parallel to the polylith electricity of 1 length direction of body
Pole plate 21 will produce high-voltage electrostatic field between polylith electrode plate 21, is fixedly installed in the lower surface of electrostatic room 15 at work
The dust deposited case 1 being connected to electrostatic room 15, wherein horizontal sliding is provided with drawer 1 on the side wall of dust deposited case 1.
When exhaust gas is entered by inlet cylinder 12 in electrostatic room 15, oil droplet, the dust of larger particles can be fallen in dust deposited case one
In drawer 1 in 22, the oil droplet of lighter in weight can be adsorbed when by high-voltage electrostatic field by electrode plate 21, and part meeting
It is carbonized, more effectively tar is removed, while playing degradation harmful components, play the role of disinfection.
After exhaust gas passes through electrostatic precipitator 2, most dust is removed, thus same being removed to tar
When, more effectively alleviate the dedusting working strength of dedusting mechanism 3.
As shown in Figure 3 and Figure 4, dedusting mechanism 3 is fixed in dirt pocket 16, including is fixed in dirt pocket 16
Filter screen 31 remove dust therein for being filtered to exhaust gas.
Filter screen 31 is provided with multilayer, is described further for three layers herein：
Filter screen 31 includes in setting dirt pocket 16 and close to the filter screen 1 of the side of inlet cylinder 12, close outlet
The filter screen 3 313 of one 13 sides of cylinder and the filter screen 2 312 being folded between filter screen 1 and filter screen 3 313,
In, filter screen 1, filter screen 2 312, filter screen 3 313 porosity be sequentially reduced, and by filter screen 3 313 be discharged
Gas meets national standard, by the multiple filtration net 31 of setting, can be filtered by different level to dust air so that dust
It is separately removed, filter screen 31 is not easy to be blocked, and dust removing effects are higher.
Meanwhile when in use between it is longer when, dust be easy accumulation filter screen 31 on, in order to avoid the hair of dust accumulation phenomenon
It is raw, filter screen 31 is obliquely installed so that filter screen 31 is at an acute angle close to the angle a of lower section one side with dirt pocket 16, meanwhile,
Under air draught effect, in order to enable dust removing effects are preferable, the angle of angle a is controlled at 45 degree -60 between degree, to which filter screen 31 exists
It being acted on down by air draught, the contact area between exhaust gas and filter screen 31 is larger so that filter effect is preferable, meanwhile, dust is again
It is not easy to be deposited on filter screen 31.
Filter screen 31 after a period of use, in order to not influence its filter effect, need to clean it, for side
Just it cleans, filter screen 31 is detachably arranged in dirt pocket 16.
It is that the side far from supporting rack 11 offers the elongated slot perpendicular to 16 length direction of dirt pocket in 16 upper end of dirt pocket
161, and all offer mounting groove 162 in the both sides of length direction in dirt pocket 16 and the side far from elongated slot 161, wherein
Elongated slot 161, mounting groove 162 are inclined, to facilitate filter screen 31 to install, are fixedly installed in the surrounding of filter screen 31
Frame 314, when mounted, filter screen 31 are inserted by elongated slot 161, and frame 314 is connected in mounting groove 162, in filter screen 31
Upper end is fixedly installed fixed plate 315, and when installation, 315 level of fixed plate is connected to 16 outside of dirt pocket and in the two of elongated slot 161
Side is simultaneously fixed by using bolt, meanwhile, in dedusting, dust is appeared from 161 gap of elongated slot in order to prevent, in fixed plate 315
The side of 16 outer wall of dirt pocket is provided with gasket 3151（As shown in Figure 5）.
The material of filter screen 31 can be stainless steel filter screen or non-woven fabrics.
Meanwhile when in use, the dust in dirt pocket 16 is cleared up for convenience, in the lower surface of dirt pocket 16 and
All offer dust mouth 163 close to the side of inlet cylinder 12 in every piece of filter screen 31, in the outside of dirt pocket 16 be fixedly installed with
The dust deposited case 2 32 that dust mouth 163 is connected to, drawer 2 321 is provided in one Slideslip of level of dust deposited case 2 32, to convenient
Dust in dust deposited case 2 32 is purged.
The solid granule in exhaust gas can be removed by the dedusting mechanism 3 of setting, then exhaust gas enters desulfurization
Room 4（As shown in Figure 6）.
As shown in fig. 6, desulfurization mechanism 4 is fixed in desulfurization chamber 17, desulfurization mechanism 4 includes being fixed at desulfurization chamber
The ponding storehouse 41 of 17 bottoms, the sprayed tank 42 being fixedly installed above ponding storehouse 41 and for by the water pump in ponding storehouse 41
Enter the water pump 43 of sprayed tank 42, wherein the side wall of sprayed tank 42 is by using the through-hole 141 in air inlet pipe 421 and mounting plate 14
Connection, to introduce exhaust gas into sprayed tank 42；43 one end of water pump by water inlet pipe 431 connect ponding storehouse 41, the other end by into
Water pipe 431 is connected to the upside of sprayed tank 42, in being fixedly installed the nozzle 44 being connect with water inlet pipe 431 in sprayed tank 42；It is spraying
The lower end of leaching tank 42 is communicated with ponding storehouse 41 by using drainpipe 422, so that solution enters sprayed tank by water inlet pipe 431
42, solution flows back to ponding storehouse 41 by drainpipe 422 so that solution forms cycle, can be with recycled for multiple times.
It is connected with escape pipe 423 in the upside of sprayed tank 42, the other end of escape pipe 423 connects gas outlet 13, thus will
Gas is discharged.
When gas passes through sprayed tank 42, in order to sulfur dioxide, the nitrogen oxide in gas（NOx）Equal gases into
Row removal, for solution using the mixed solution of hypochlorite and pressure chlorate, desulphurization and denitration effect is preferable, and industrial low cost,
Waste liquid handlability is high.
In conjunction with Fig. 1 and Fig. 6, the drain pipe 411 and inlet tube in connection ponding storehouse 41 are provided on the side wall of desulfurization chamber 17
412, and by using 413 current limliting of ball valve, so as to be replaced to the liquid in ponding storehouse 41.
This specific embodiment is only the explanation to the utility model, is not limitations of the present invention, ability
Field technique personnel can as needed make the present embodiment the modification of not creative contribution after reading this specification, but
As long as all being protected by Patent Law in the right of the utility model.
Claims (8)
1. a kind of bituminous mixing plant emission-control equipment, including body（1）, it is set to body（1）Interior dedusting mechanism（3）,
It is characterized in：
The body（1）Inside uses two mounting plates（14）Interval forms electrostatic room（15）, dirt pocket（16）And desulfurization chamber
（17）, the electrostatic room（15）Inside it is fixedly installed electrostatic precipitator（2）, the dirt pocket（16）Inside it is fixedly installed dust removal machine
Structure（3）, the desulfurization chamber（17）Inside it is fixedly installed desulfurization mechanism（4）；When handling exhaust gas, exhaust gas passes sequentially through electrostatic precipitation
Device（2）, dedusting mechanism（3）With desulfurization mechanism（4）.
2. bituminous mixing plant emission-control equipment according to claim 1, it is characterized in that：
The electrostatic room（15）And in electrostatic precipitator（2）Downside be fixedly installed and the electrostatic room（15）The dust accumulation of connection
Case one（22）, the dust deposited case one（22）Interior level is plugged with drawer one（221）.
3. bituminous mixing plant emission-control equipment according to claim 1, it is characterized in that：
The dedusting mechanism（3）Including being arranged at intervals on dirt pocket（16）Interior multiple filter screens（31）, dirt pocket（16）Downside
And in each filter screen（31）Close air inlet side is both provided with and dirt pocket（16）The dust deposited case two of connection（32）.
4. bituminous mixing plant emission-control equipment according to claim 3, it is characterized in that：
The filter screen（31）It is obliquely installed, with dirt pocket（16）Bottom and close into exhaust gas side it is at an acute angle.
5. bituminous mixing plant emission-control equipment according to claim 3, it is characterized in that：
Multiple filter screens（31）It is sequentially reduced by the lateral outlet side hole of air inlet.
6. bituminous mixing plant emission-control equipment according to claim 4 or 5, it is characterized in that：
The dirt pocket（16）Far from dust deposited case two（32）Side offer elongated slot（161）, the dirt pocket（16）Inside open up
It is useful for the filter screen（31）The mounting groove of plugged and fixed（162）.
7. bituminous mixing plant emission-control equipment according to claim 1, it is characterized in that：
The desulfurization mechanism（4）Including being fixed at desulfurization chamber（17）The ponding storehouse of bottom（41）, in ponding storehouse（41）Top
It is fixedly installed and ponding storehouse（41）The sprayed tank of connection（42）And setting is for by the ponding storehouse（41）Interior solution pump
Enter sprayed tank（42）Water pump（43）, in the sprayed tank（42）Interior has been fixedly arranged at the upper side nozzle（44）, the exhaust gas by
Sprayed tank（42）Lower wall is connected to inner cavity, in the sprayed tank（42）Upside is provided with the sprayed tank（42）Interior gas export
Escape pipe（423）.
8. bituminous mixing plant emission-control equipment according to claim 7, it is characterized in that：
The ponding storehouse（41）Interior liquid is hypochlorite and presses the mixed solution of chlorate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721491975.4U CN207605529U (en) | 2017-11-09 | 2017-11-09 | A kind of bituminous mixing plant emission-control equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721491975.4U CN207605529U (en) | 2017-11-09 | 2017-11-09 | A kind of bituminous mixing plant emission-control equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207605529U true CN207605529U (en) | 2018-07-13 |
Family
ID=62795576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721491975.4U Expired - Fee Related CN207605529U (en) | 2017-11-09 | 2017-11-09 | A kind of bituminous mixing plant emission-control equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207605529U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109395538A (en) * | 2018-11-26 | 2019-03-01 | 中冶焦耐(大连)工程技术有限公司 | Bitumen flue gas clean and environmental protection collection processing system implementing and method when liquid bitumen is unloaded |
| CN110093839A (en) * | 2019-05-31 | 2019-08-06 | 朱建武 | A kind of asphalt paving tail gas filter |
| CN113680784A (en) * | 2020-05-19 | 2021-11-23 | 中国石油天然气集团有限公司 | Oily solid waste thermal desorption system and process capable of efficiently utilizing heat energy |
-
2017
- 2017-11-09 CN CN201721491975.4U patent/CN207605529U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109395538A (en) * | 2018-11-26 | 2019-03-01 | 中冶焦耐(大连)工程技术有限公司 | Bitumen flue gas clean and environmental protection collection processing system implementing and method when liquid bitumen is unloaded |
| CN110093839A (en) * | 2019-05-31 | 2019-08-06 | 朱建武 | A kind of asphalt paving tail gas filter |
| CN113680784A (en) * | 2020-05-19 | 2021-11-23 | 中国石油天然气集团有限公司 | Oily solid waste thermal desorption system and process capable of efficiently utilizing heat energy |
| CN113680784B (en) * | 2020-05-19 | 2023-02-07 | 中国石油天然气集团有限公司 | Oily solid waste thermal desorption system and process capable of efficiently utilizing heat energy |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20180713 Termination date: 20201109 |