CN109913283A - Low order coal dewatering and ash disposal integral system and its working method - Google Patents
Low order coal dewatering and ash disposal integral system and its working method Download PDFInfo
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- 239000003245 coal Substances 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000006243 chemical reaction Methods 0.000 claims abstract description 43
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000002817 coal dust Substances 0.000 claims abstract description 30
- 238000004821 distillation Methods 0.000 claims abstract description 30
- 238000000227 grinding Methods 0.000 claims abstract description 27
- 239000002245 particle Substances 0.000 claims abstract description 23
- 238000001035 drying Methods 0.000 claims abstract description 20
- 239000004744 fabric Substances 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000002994 raw material Substances 0.000 claims abstract description 15
- 239000002699 waste material Substances 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000003546 flue gas Substances 0.000 claims abstract description 6
- 238000012216 screening Methods 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 15
- 239000007789 gas Substances 0.000 claims description 13
- 239000007787 solid Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 6
- 238000009833 condensation Methods 0.000 claims description 4
- 230000005494 condensation Effects 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000006482 condensation reaction Methods 0.000 claims description 2
- 238000001704 evaporation Methods 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 230000018044 dehydration Effects 0.000 abstract description 2
- 238000006297 dehydration reaction Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000003517 fume Substances 0.000 abstract description 2
- 239000002956 ash Substances 0.000 description 15
- 238000005516 engineering process Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 108010066057 cabin-1 Proteins 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005273 aeration Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Abstract
Low order coal dewatering and ash disposal integral system, including raw material cabin, crushing grinding machine, high-frequency screen, reaction unit, water bath heating device, No.1 sand core funnel, distillation still, waste treatment equipment, condenser, No. two sand core funnels, microwave dryer, cloth envelop collector and coal dust bunker.The invention also discloses the working methods of low order coal dewatering and ash disposal integral system.The present invention passes through crushing grinding and screening process, the granularity of low order coal particle is reduced as much as possible, coal particle is set largely to deviate from ash content in the process reacted with hydrochloric acid, the contact area of coal particle and hot fume in drying process is increased simultaneously, ensure that the deliming and dehydration quality of low order coal particle；Dry the utilized flue gas of low-order coal and the hydrochloric acid reacted with pulverized coal particle are that closed cycle utilizes, and have the advantages that energy conservation, efficient, environmental protection.
Description
Technical field
The invention belongs to Coal dressing technical fields, and in particular to a kind of low order coal dewatering and ash disposal integral system and its
Working method.
Background technique
The coal reserves in China is abundant, great variety of goods, includes but the coal from mud coal to anthracitic various type of coal
The reserves of resource and distribution are different.In many coal resources, low-quality bituminous coal (jet coal, weakly caking coal, dross coal etc.)
Reserves are most abundant, and the 42.46% of Zhan Quanguo proven reserve.Low-order coal water content is high, ash content is big, directly burn as fuel by
Lead to that efficiency of combustion is low, causes transport pressure；In addition, the low-order coal content of ashes in China is big, in production active carbon etc.
It cannot be up to standard when technique.It therefore, is bring adverse effect in reduction low-order coal use process, it is necessary to be done to low-order coal
It is dry, deash.Traditional low order coal drying method has firepower desiccation and aeration drying etc..Powder is easy to produce during firepower desiccation
Dirt is also easy to produce explosive mixture in chimney.Since the moisture of low-order coal is high, aeration drying can not thoroughly do low-order coal
It is dry.Microwave drying is a kind of novel heat energy technology, and when using microwave radiation drying low-order coal, the water of low-order coal absorbs microwave
It is very capable.Therefore, it can not only be dehydrated using microwave radiation drying low-order coal, will not also cause crossing for coal matrix to thermally decompose, keep away
Exempt from low-order coal property variation.Compared with traditional low-order coal dry technology, microwave drying low-order coal technology has globality, selection
Property, high efficiency and safety, health, free of contamination advantage.
The method of removal ash content is not very mature at present, takes physical method mostly using partial size difference to remove ash content,
But the removal rate of this method is low, cannot reach the requirement of fat coal.
Summary of the invention
The present invention provides a kind of low order coal dewatering and ash disposal integral system to solve shortcoming in the prior art
And its working method, structure is simpler, more safe and reliable, energy conservation and environmental protection, can be realized drying, the deliming one of low-order coal
Change processing, to effectively improve the upgrading quality of low-order coal.
In order to solve the above technical problems, the present invention adopts the following technical scheme: low order coal dewatering and ash disposal integral system,
At raw material cabin, crushing grinding machine, high-frequency screen, reaction unit, water bath heating device, No.1 sand core funnel, distillation still, waste
Device, microwave dryer, cloth envelop collector and coal dust bunker are managed,
The discharge port of raw material cabin is connect with the feed inlet of crushing grinding machine, the discharge port of crushing grinding machine and the feed inlet of high-frequency screen
Connection, the discharge port of qualified material and the feed inlet of reaction unit connect after high-frequency screen screening, and reaction unit setting adds in water-bath
Inside thermal, the discharge port of reaction unit is connect with the feed inlet of No.1 sand core funnel, the solids exit of No.1 sand core funnel
Mouth is connect with the feed inlet of microwave dryer, and the discharge port of microwave dryer is connect with the feed inlet of coal dust bunker, microwave drying
The dust export of device and the feed inlet of cloth envelop collector connect, the liquid outlet opening of No.1 sand core funnel and the feed inlet of distillation still
Connection, the waste outlet of distillation still and the feed inlet of waste treatment equipment connect.
Further include condenser and No. two sand core funnels, the gas outlet of cloth envelop collector, distillation still gas vent with it is cold
The import downlink connection of condenser, the liquid outlet of condenser are connect with the feed inlet of No. two sand core funnels, and No. two sand core funnels go out
The connection of the feed inlet of material mouth and reaction unit.
The discharge port of unqualified material is connect by feed back pipe with the feed inlet of crushing grinding machine after high-frequency screen screening.
Reaction unit includes container, lid and blender.
The working method of low order coal dewatering and ash disposal integral system, includes the following steps,
(1) the low-order coal raw material discharging being stored in raw material cabin enters in crushing grinding machine, and crushing grinding machine is former by low-order coal
Abrasive lapping is admitted in high-frequency screen at coal dust, ground coal dust, screens out granularity greater than 150 purposes by the sieve of high-frequency screen
Coal particle and the coal dust in 0-150 mesh；The coal particle that granularity is greater than 150 mesh is returned in crushing grinding machine again by feed back pipe again
Secondary grinding, the granularity of coal particle are screened after becoming smaller again by high-frequency screen, until coal particle becomes coal dust after being respectively less than 150 mesh；
(2) high-frequency screen is screened out granularity to be transported in reaction unit less than the coal dust of 150 mesh, hydrochloric acid is added in reaction unit
Until flooding coal dust completely, lid is then closed, sealing container starts blender, while starting water bath heating device to container
It is heated, maintains water temperature at 55 DEG C, continue 30min, make coal dust and hydrochloric acid fully reacting in container；
(3) substance after reacting in reaction unit is filtered using No.1 sand core funnel, filtered solid is put into micro-
Wave drier is dried, and is sent to coal dust with qualified products of the ash content less than 5% below 10% to obtain moisture and stores
It is saved in storehouse；
(4) liquid of No.1 sand core funnel filtering, which is sent in distillation still, carries out distillation processing, remaining solid after distillation still distillation
Body, which is sent to, to be handled and is stored in waste treatment equipment, and the gas that distillation still distills out is condensed through condenser, is sent after condensation
Reaction unit is returned, to provide hydrochloric acid for reaction unit；
(5) flue gas of microwave dryer discharge is by cloth envelop collector processing, and treated that gas is sent to condensation for cloth envelop collector
Device is condensed, then by No. two sand core funnel filterings, liquid is sent to reaction unit, so that hydrochloric acid is provided for reaction unit,
The solid that cloth envelop collector filters out places into microwave dryer.
The vapo(u)rizing temperature of distillation still is 110-120 DEG C, and the drying temperature of microwave dryer is 115-120 DEG C.
By adopting the above technical scheme, for the flue gas being discharged from microwave dryer by filtering, gas is sent to condenser condensation, follows
Ring uses hydrochloric acid, and solid, which then sends microwave dryer back to, realizes recycling for hydrochloric acid, reaches energy-saving and environment-friendly purpose.No.1 sand
The filtered liquid of core funnel, first distills and condenses feeding reaction unit again, not only reduce danger, also achieves the circulation of hydrochloric acid
It utilizes.
Drier selects microwave dryer, and in microwave field, the microwave energy of moisture absorption is 100 times of coal, and utilization is micro-
When wave radiation heats low-order coal, moisture absorption most of microwave radiation energy, temperature are risen rapidly, thus evaporated.It is micro-
The selectivity of wave makes heating low-order coal that can remove effectively the moisture in coal, without influencing the organic component in coal.Separately
Outside, microwave drying safety is preferable, and drying temperature can be controlled in 120 DEG C or so, and burning or explosion accident will not occur, dry
High-efficient microwave energy is high to the heating efficiency of water, in one range of granularity can evenly drying, technology maturation, technology controlling and process is simple,
Automated production can be achieved, production capacity flexible design single production line tons per hour, the water dried out is recyclable, more to water-deficient area
Favorably.
Chemical method is used in the present invention, hydrochloric acid and pulverized coal particle are reacted, and sufficiently after reaction, remove the ash in coal
Point, filtered liquid, which is first passed through, to distill to condense again realizes recycling for hydrochloric acid；The low-order coal obtained after upgrading processing
Product calorific value can achieve extraordinary effect.
In conclusion the present invention has the advantage that relative to traditional technical matters
1, by crushing grinding and screening process, reduce the granularity of low order coal particle as much as possible, make coal particle with hydrochloric acid
The process of reaction can largely deviate from ash content, while increase the contact surface of coal particle and hot fume in drying process
Product ensure that the deliming and dehydration quality of low order coal particle；
2, the temperature of liquid uses water bath heating device in reaction unit, can efficiently control temperature, and can keep temperature
Not big variation ensure that and corresponsively carry out；Have chosen microwave dryer, microwave drying low-order coal technology have globality,
Selectivity, high efficiency and safety, health, free of contamination advantage；
3, dry the utilized flue gas of low-order coal and the hydrochloric acid reacted with pulverized coal particle are that closed cycle utilizes in system, are had
Energy conservation, advantage efficiently, environmentally friendly.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Appended drawing reference be respectively as follows: 1- raw material cabin, 2- crushing grinding machine, 3- high-frequency screen, 4- reaction unit, 5- water bath heating device,
6- No.1 sand core funnel, 7- distillation still, 8- waste treatment equipment, 9- condenser, No. bis- sand core funnels of 10-, 11- microwave drying
Device, 12- cloth envelop collector, 13- coal dust bunker.
Specific embodiment
As shown in Figure 1, low order coal dewatering and ash disposal integral system of the invention, including raw material cabin 1, crushing grinding machine 2,
High-frequency screen 3, reaction unit 4, water bath heating device 5, No.1 sand core leak 6 buckets, distillation still 7, waste treatment equipment 8, condenser 9,
No. two sand core funnels 10, microwave dryer 11, cloth envelop collector 12 and coal dust bunker 13, these equipment are existing conventional skill
Art, specific configuration repeat no more.
The discharge port of raw material cabin 1 is connect with the feed inlet of crushing grinding machine 2, the discharge port and high-frequency screen 3 of crushing grinding machine 2
Feed inlet connection, the discharge port of qualified material is connect with the feed inlet of reaction unit 4 after high-frequency screen 3 sieves, and reaction unit 4 is set
It sets inside water bath heating device 5, the discharge port of reaction unit 4 is connect with the feed inlet of 6 bucket of No.1 sand core leakage, the leakage of No.1 sand core
The solid outlet of 6 buckets is connect with the feed inlet of microwave dryer 11, discharge port and the coal dust bunker 13 of microwave dryer 11
Feed inlet connection, the dust export of microwave dryer 11 are connect with the feed inlet of cloth envelop collector 12, the liquid of 6 bucket of No.1 sand core leakage
Body discharge port is connect with the feed inlet of distillation still 7, and the waste outlet of distillation still 7 is connect with the feed inlet of waste treatment equipment 8.
The gas outlet of cloth envelop collector 12, distillation still 7 gas vent with the import downlink connection of condenser 9, condenser 9
Liquid outlet connect with the feed inlet of No. two sand core funnels 10, the discharge ports of No. two sand core funnels 10 and reaction unit 4 into
Material mouth connection.
The discharge port of unqualified material is connect by feed back pipe with the feed inlet of crushing grinding machine 2 after high-frequency screen 3 sieves.
Reaction unit 4 includes container, lid and blender.
The working method of low order coal dewatering and ash disposal integral system, includes the following steps,
(1) the low-order coal raw material discharging being stored in raw material cabin 1 enters in crushing grinding machine 2, and crushing grinding machine 2 is by low-order coal
Raw material is ground into coal dust, and ground coal dust is admitted in high-frequency screen 3, screens out granularity greater than 150 by the sieve of high-frequency screen 3
Purpose coal particle and the coal dust in 0-150 mesh；The coal particle that granularity is greater than 150 mesh returns to crushing grinding machine by feed back pipe again
Regrinding in 2, the granularity of coal particle is screened after becoming smaller again by high-frequency screen 3, until coal particle becomes after being respectively less than 150 mesh
Coal dust；
(2) high-frequency screen 3 is screened out granularity to be transported in reaction unit 4 less than the coal dust of 150 mesh, is added in reaction unit 4
Then hydrochloric acid closes lid, sealing container starts blender, while it is right to start water bath heating device 5 up to flooding coal dust completely
Container is heated, and maintains water temperature at 55 DEG C, continues 30min, makes coal dust and hydrochloric acid fully reacting in container；
(3) substance after reacting in reaction unit 4 is filtered using 6 bucket of No.1 sand core leakage, filtered solid is put into
Microwave dryer 11 is dried, so that obtaining moisture is sent to coal with qualified products of the ash content less than 5% below 10%
It is saved in powder bunker 13；
(4) liquid of 6 bucket filtering of No.1 sand core leakage, which is sent in distillation still 7, carries out distillation processing, and distillation still 7 is remaining after distilling
Solid, which is sent to, to be handled and is stored in waste treatment equipment 8, and the gas that distillation still 7 distills out is condensed through condenser 9, condensation
After send reaction unit 4 back to, to provide hydrochloric acid for reaction unit 4；
(5) flue gas that microwave dryer 11 is discharged is by the processing of cloth envelop collector 12, and treated that gas is sent for cloth envelop collector 12
It is condensed to condenser 9, then is filtered by No. two sand core funnels 10, liquid is sent to reaction unit 4, to be reaction unit
4 provide hydrochloric acid, and the solid that cloth envelop collector 12 filters out places into microwave dryer 11.
The vapo(u)rizing temperature of distillation still 7 is 110-120 DEG C, and the drying temperature of microwave dryer 11 is 115-120 DEG C.
The present embodiment not makes any form of restriction shape of the invention, material, structure etc., all according to this hair
Bright technical spirit any simple modification, equivalent change and modification to the above embodiments, belong to the technology of the present invention side
The protection scope of case.
Claims (6)
1. low order coal dewatering and ash disposal integral system, it is characterised in that: including raw material cabin, crushing grinding machine, high-frequency screen, reaction
Device, water bath heating device, No.1 sand core funnel, distillation still, waste treatment equipment, microwave dryer, cloth envelop collector and coal
Powder bunker,
The discharge port of raw material cabin is connect with the feed inlet of crushing grinding machine, the discharge port of crushing grinding machine and the feed inlet of high-frequency screen
Connection, the discharge port of qualified material and the feed inlet of reaction unit connect after high-frequency screen screening, and reaction unit setting adds in water-bath
Inside thermal, the discharge port of reaction unit is connect with the feed inlet of No.1 sand core funnel, the solids exit of No.1 sand core funnel
Mouth is connect with the feed inlet of microwave dryer, and the discharge port of microwave dryer is connect with the feed inlet of coal dust bunker, microwave drying
The dust export of device and the feed inlet of cloth envelop collector connect, the liquid outlet opening of No.1 sand core funnel and the feed inlet of distillation still
Connection, the waste outlet of distillation still and the feed inlet of waste treatment equipment connect.
2. low order coal dewatering according to claim 1 and ash disposal integral system, it is characterised in that: further include condenser and
No. two sand core funnels, the gas outlet of cloth envelop collector, distillation still gas vent with the import downlink connection of condenser, condenser
Liquid outlet connect with the feed inlet of No. two sand core funnels, the discharge port of No. two sand core funnels and the feed inlet of reaction unit connect
It connects.
3. low order coal dewatering according to claim 1 and ash disposal integral system, it is characterised in that: after high-frequency screen screening not
The discharge port of qualified material is connect by feed back pipe with the feed inlet of crushing grinding machine.
4. low order coal dewatering according to claim 1 and ash disposal integral system, it is characterised in that: reaction unit includes holding
Device, lid and blender.
5. using the working method of low order coal dewatering and ash disposal integral system as claimed in claim 4, it is characterised in that: packet
Include following steps,
(1) the low-order coal raw material discharging being stored in raw material cabin enters in crushing grinding machine, and crushing grinding machine is former by low-order coal
Abrasive lapping is admitted in high-frequency screen at coal dust, ground coal dust, screens out granularity greater than 150 purposes by the sieve of high-frequency screen
Coal particle and the coal dust in 0-150 mesh；The coal particle that granularity is greater than 150 mesh is returned in crushing grinding machine again by feed back pipe again
Secondary grinding, the granularity of coal particle are screened after becoming smaller again by high-frequency screen, until coal particle becomes coal dust after being respectively less than 150 mesh；
(2) high-frequency screen is screened out granularity to be transported in reaction unit less than the coal dust of 150 mesh, hydrochloric acid is added in reaction unit
Until flooding coal dust completely, lid is then closed, sealing container starts blender, while starting water bath heating device to container
It is heated, maintains water temperature at 55 DEG C, continue 30min, make coal dust and hydrochloric acid fully reacting in container；
(3) substance after reacting in reaction unit is filtered using No.1 sand core funnel, filtered solid is put into micro-
Wave drier is dried, and is sent to coal dust with qualified products of the ash content less than 5% below 10% to obtain moisture and stores
It is saved in storehouse；
(4) liquid of No.1 sand core funnel filtering, which is sent in distillation still, carries out distillation processing, remaining solid after distillation still distillation
Body, which is sent to, to be handled and is stored in waste treatment equipment, and the gas that distillation still distills out is condensed through condenser, is sent after condensation
Reaction unit is returned, to provide hydrochloric acid for reaction unit；
(5) flue gas of microwave dryer discharge is by cloth envelop collector processing, and treated that gas is sent to condensation for cloth envelop collector
Device is condensed, then by No. two sand core funnel filterings, liquid is sent to reaction unit, so that hydrochloric acid is provided for reaction unit,
The solid that cloth envelop collector filters out places into microwave dryer.
6. using the working method of low order coal dewatering and ash disposal integral system as claimed in claim 4, it is characterised in that: steam
The vapo(u)rizing temperature for evaporating kettle is 110-120 DEG C, and the drying temperature of microwave dryer is 115-120 DEG C.
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Citations (6)
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|---|---|---|---|---|
| CN202304303U (en) * | 2011-09-30 | 2012-07-04 | 山东博润工业技术有限公司 | Microwave drying and quality improving device for low-quality coal |
| CN102796588A (en) * | 2011-05-26 | 2012-11-28 | 烟台龙源电力技术股份有限公司 | Lignite drying method and device |
| CN103421567A (en) * | 2013-01-10 | 2013-12-04 | 泸州兰良水泥有限公司 | Pure coal and production method thereof |
| CN104891470A (en) * | 2015-04-17 | 2015-09-09 | 石家庄新华能源环保科技股份有限公司 | Method for high-temperature removal of coal powder ash |
| CN105238472A (en) * | 2015-09-12 | 2016-01-13 | 西南科技大学 | Method for producing clean coal by utilizing industrial waste heat |
| CN106833785A (en) * | 2017-02-10 | 2017-06-13 | 中国矿业大学 | A kind of deliming of low-order coal, dry combined technique and system |
-
2019
- 2019-03-19 CN CN201910207666.7A patent/CN109913283A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102796588A (en) * | 2011-05-26 | 2012-11-28 | 烟台龙源电力技术股份有限公司 | Lignite drying method and device |
| CN202304303U (en) * | 2011-09-30 | 2012-07-04 | 山东博润工业技术有限公司 | Microwave drying and quality improving device for low-quality coal |
| CN103421567A (en) * | 2013-01-10 | 2013-12-04 | 泸州兰良水泥有限公司 | Pure coal and production method thereof |
| CN104891470A (en) * | 2015-04-17 | 2015-09-09 | 石家庄新华能源环保科技股份有限公司 | Method for high-temperature removal of coal powder ash |
| CN105238472A (en) * | 2015-09-12 | 2016-01-13 | 西南科技大学 | Method for producing clean coal by utilizing industrial waste heat |
| CN106833785A (en) * | 2017-02-10 | 2017-06-13 | 中国矿业大学 | A kind of deliming of low-order coal, dry combined technique and system |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190621 |
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| RJ01 | Rejection of invention patent application after publication |