CN110759669A - Filler for treating discarded pipeline and harmless treatment method of discarded pipeline - Google Patents
Filler for treating discarded pipeline and harmless treatment method of discarded pipeline Download PDFInfo
- Publication number
- CN110759669A CN110759669A CN201911116690.6A CN201911116690A CN110759669A CN 110759669 A CN110759669 A CN 110759669A CN 201911116690 A CN201911116690 A CN 201911116690A CN 110759669 A CN110759669 A CN 110759669A
- Authority
- CN
- China
- Prior art keywords
- parts
- filler
- pipeline
- treating
- weight
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00663—Uses not provided for elsewhere in C04B2111/00 as filling material for cavities or the like
- C04B2111/00706—Uses not provided for elsewhere in C04B2111/00 as filling material for cavities or the like around pipelines or the like
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a filler for treating a scrapped pipeline and a harmless treatment method of the scrapped pipeline, and relates to the technical field of scrapped pipeline treatment, in particular to the filler which comprises the following components in parts by weight: 10-100 parts of activated sludge, 20-50 parts of cement and 5-50 parts of solid matrix. According to the embodiment of the invention, the discarded pipeline is filled by the filler rich in organic matters, the soil fertility is not influenced, the compressive strength of the pipeline after being cured is higher than that of the soil and lower than that of the existing slurry after being cured, the volume is not shrunk, the ground is not collapsed, and the stability of ground surface bearing objects is not influenced.
Description
Technical Field
The invention relates to the technical field of discarded pipeline treatment, in particular to a filler for treating a discarded pipeline and a harmless treatment method of the discarded pipeline.
Background
The underground pipeline network has complex use and takes on the conveying function of various fluids such as water, warm air, oil and the like. After the metal pipeline is built, along with the expansion of the activity range of human beings, the use of the environment and the land around a plurality of pipelines is changed dramatically, and the scrapped pipelines in partial sections cannot be removed due to the factors of economy, safety, environmental protection and the like, such as the sections of farmlands, forest lands and the like, adjacent industrial, commercial and civil facilities, road traffic and the like.
The waste pipeline is usually treated in a mode that the pipeline can be disassembled and disassembled, the pipeline cannot be disassembled and is filled after being cleaned, and the pipeline with small pipe diameter can be cleaned and then discarded on site. The traditional filling medium has high hardness and high strength, leaves hidden troubles for future land utilization, and easily causes damage to farmland deep ploughing machines or underground operation mechanical equipment.
In view of this, the invention is particularly proposed.
Disclosure of Invention
The invention aims to provide a filler for processing a scrapped pipeline and a processing method thereof. Provides a new solution for the treatment of the abandoned pipeline.
The invention is realized by the following steps:
in a first aspect, an embodiment provides a filler for processing a discarded pipeline, where the filler includes, by weight: 10-100 parts of activated sludge, 20-50 parts of cement and 5-50 parts of solid matrix.
In an alternative embodiment, the filler comprises, in parts by weight: 40-100 parts of activated sludge, 30-50 parts of cement and 20-40 parts of solid matrix.
In alternative embodiments, the filling further comprises one or more of lime, a thickener, a foaming agent, and a retarder.
In an optional embodiment, the filler further comprises 0.1-10 parts by weight of lime, 0.1-5 parts by weight of a thickener, 0.1-15 parts by weight of a foaming agent and 0.1-2 parts by weight of a retarder;
in an alternative embodiment, the filler further comprises: 6-10 parts of lime, 1-5 parts of thickening agent, 1-5 parts of foaming agent and 1-2 parts of retarder.
In an alternative embodiment, the solid substrate is selected from fly ash or bentonite.
In an alternative embodiment, the filling further comprises water.
In an alternative embodiment, the filling further comprises 80-120 parts by weight of water.
In a second aspect, embodiments provide a method for harmless treatment of a discarded pipe, which includes filling the discarded pipe with the filler for treating the discarded pipe provided in the foregoing embodiments.
In an alternative embodiment, the reject pipe comprises: at least one of a gas delivery pipeline, an oil delivery pipeline, a heating delivery pipeline and a water delivery pipeline.
In an alternative embodiment, before filling the pipeline, the harmless treatment method comprises the steps of forming a grouting hole and an air outlet hole in the pipeline;
in an alternative embodiment, the grout holes and the air outlet holes are spaced apart at both ends of the tube.
In an alternative embodiment, the method of detoxification treatment comprises closing the grout holes and the gas outlet holes after filling the pipeline.
In an alternative embodiment, the method of detoxification includes cleaning the pipeline prior to filling the pipeline.
In an alternative embodiment, the filler occupies 96% to 100% of the volume within the spent conduit.
The invention has the beneficial effects that:
the embodiment of the invention provides a filler for treating a scrapped pipeline, which comprises the following components in parts by weight: 10-100 parts of activated sludge, 20-50 parts of cement and 5-50 parts of solid matrix. The scrapped pipeline is filled by the filler rich in organic matters, the soil fertility is not influenced, after solidification, the compressive strength of the pipeline is higher than that of the soil and lower than that of the existing slurry after solidification, the volume is not shrunk, the ground is not collapsed, and the stability of ground surface bearing objects is not influenced.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The materials or instruments used are not indicated by the manufacturer, and are all conventional products available by commercial purchase.
The features and properties of the present invention are described in further detail below with reference to examples.
The embodiment of the invention provides a filler for treating a scrapped pipeline, which comprises the following components in parts by weight: 10-100 parts of activated sludge, 20-50 parts of cement and 5-50 parts of solid matrix.
The activated sludge adopted in the embodiment of the invention is sludge produced by an urban domestic wastewater treatment plant. Anaerobic bacteria in the activated sludge can degrade trace oil stain remained in the pipeline, and organic matters in the sludge can improve the fertility of the filling material, so that the soil affinity is increased. And fine holes can be generated in the filler after the activated sludge is naturally degraded, so that the porosity of the filler is improved, water and nutrient substances in the soil can migrate into the filler, the difference between the filler and the soil is reduced, the soil affinity of the filler is improved, and the growth of a plant root system is not influenced.
In an alternative embodiment, the filler comprises, in parts by weight: 40-100 parts of activated sludge, 30-50 parts of cement and 20-40 parts of solid matrix.
In alternative embodiments, the filling further comprises one or more of lime, a thickener, a foaming agent, and a retarder.
In an optional embodiment, the filler further comprises 0.1-10 parts by weight of lime, 0.1-5 parts by weight of a thickening agent, 0.1-15 parts by weight of a foaming agent and 0.1-2 parts by weight of a retarder.
In an alternative embodiment, the filler further comprises: 6-10 parts of lime, 1-5 parts of thickening agent, 1-5 parts of foaming agent and 1-2 parts of retarder.
In an alternative embodiment, the solid substrate is selected from fly ash or bentonite.
In an alternative embodiment, the filling further comprises water;
in an alternative embodiment, the filling further comprises 80-120 parts by weight of water.
The embodiment of the invention also provides a harmless treatment method of the discarded pipeline, which comprises the step of filling the discarded pipeline with the filler for treating the discarded pipeline in the embodiment.
In an alternative embodiment, the reject pipe comprises: at least one of a gas delivery pipeline, an oil delivery pipeline, a heating delivery pipeline and a water delivery pipeline.
In an alternative embodiment, the method of detoxification treatment comprises providing the pipe with a grout hole and an air outlet hole prior to filling the pipe.
In an alternative embodiment, the grout holes and the air outlet holes are spaced apart at both ends of the tube.
In an alternative embodiment, the method of detoxification treatment comprises closing the grout holes and the gas outlet holes after filling the pipeline.
In an alternative embodiment, the method of detoxification includes cleaning the pipeline prior to filling the pipeline.
In an alternative embodiment, the filler occupies 96% to 100% of the volume within the spent conduit. The filling degree of the filler in the scrapped pipeline is high, and underground holes caused by underground water erosion can be prevented. The compressive strength of the pipeline filler after solidification is higher than that of the surrounding soil, so that the problems of ground collapse and the like can be effectively avoided. If the pipeline has a fall, a foam ball is filled in the pipeline before grouting is needed, so that incomplete filling of the pipeline is prevented.
And the compressive strength of the filler can be reduced by micropores generated after the activated sludge is naturally degraded, so that the compressive strength of the solidified pipeline filler is lower than that of the existing slurry, and after the pipeline is corroded, the pipeline filler cannot cause damage to agricultural and forestry deep ploughing operation machines and industrial underground construction equipment.
The activated sludge of the sewage treatment plant belongs to solid waste, the treatment method provided by the embodiment of the invention can solve the problem of treatment of the activated sludge of the sewage treatment plant, and the filler has low cost and wide application value.
Example 1
The embodiment provides a filler for treating a scrapped pipeline, which comprises the following components in parts by weight:
100 parts of water, 100 parts of activated sludge, 50 parts of cement, 20 parts of fly ash, 10 parts of lime, 1 part of thickening agent, 5 parts of foaming agent and 2 parts of retarder.
The harmless treatment method for the scrapped pipeline by adopting the filler comprises the following steps:
two ends of the pipeline are provided with holes, one end is provided with a grouting hole, and the other end is provided with an air outlet hole. The filler provided by the embodiment is injected into the pipeline through the grouting hole, and the grouting is stopped after the slurry at the other end begins to emerge. Sealing the grouting port and the air outlet.
The volume occupied by the filler in the waste pipe is 98% of the volume in the waste pipe.
Example 2
This example provides a filler for treating a waste pipe and a harmless treatment method, which are substantially the same as those of example 1 except for the difference in parameters of the filler, and are as follows.
The filler comprises the following components in parts by weight:
100 parts of water, 80 parts of activated sludge, 30 parts of cement, 40 parts of bentonite, 10 parts of lime, 4 parts of thickening agent, 2 parts of foaming agent and 1 part of retarder.
Example 3
This example provides a filler for treating a waste pipe and a harmless treatment method, which are substantially the same as those of example 1 except that the ratio of components in the filler is different as follows.
The filler comprises the following components in parts by weight:
100 parts of water, 40 parts of activated sludge, 50 parts of cement, 20 parts of fly ash, 30% of bentonite, 10 parts of lime, 1 part of thickening agent and 2 parts of retarder.
The harmless treatment method for the scrapped pipeline by adopting the filler comprises the following steps:
the volume of the filler in the waste pipe is 96% of the volume in the waste pipe.
Comparative example 1
This comparative example provides a filler for treating a discarded pipeline and a harmless treatment method, which are substantially the same as example 1, except that the components in the filler are different,
in the filler of this example, the activated sludge was replaced with an equal amount of fly ash.
Comparative example 2
This comparative example provides a filler for treating a discarded pipeline and a harmless treatment method, which are substantially the same as example 1, except that the components in the filler are different,
in the filler of this example, the activated sludge was replaced with an equal amount of cement.
Test example 1
The hot water delivery pipe, which had been cleaned by conventional methods, was treated using the filler and treatment method provided in example 1. The pipeline has the outer diameter of 720mm, the inner diameter of 704mm, the length of 2km, the buried depth of 1-1.5 m, the pipeline passes through 1600m of farmland, 200m of forest land, 100m of road, 100m of village (without building pressure), and no drop height of the pipeline level.
And after the pipeline is solidified, sampling and detecting a part of the pipeline section.
The result of the detection
The basic bearing capacity of the filler is 1000kPa, which is higher than the basic bearing capacity of the road foundation.
The filling degree of the pipeline is 98 percent, and the filler has no water separation and meets the filling requirement.
Test example 2
The natural gas transportation pipeline is treated by the filling and the treatment method provided by the embodiment 1, and the natural gas transportation pipeline is cleaned by a conventional method. The pipeline has the outer diameter of 457mm, the inner diameter of 441mm, the length of 1.3km, the buried depth of 1-1.5 m, the pipeline passes through 600m of farmland, 50m of forest land, 80m of road, 570m of land for building (without occupying area), and the pipeline has no horizontal drop.
And after the pipeline is solidified, sampling and detecting a part of the pipeline section.
And (3) detection results:
the basic bearing capacity of the filler is 800kPa, which is higher than the basic bearing capacity design requirement of the road foundation and the building. The filling degree of the pipeline is 100 percent, and the filler has no water separation and meets the filling requirement.
Test example 3
The crude oil pipeline was treated using the packing and treatment method provided in example 1, and the crude oil pipeline was cleaned using conventional methods. The pipeline has the outer diameter of 1524mm, the inner diameter of 1494mm, the length of 12.6km, the buried depth of the pipeline of 1.0-25 m and large height fluctuation drop. The pipeline passes through 7kmm, forest land 250m, railway 100m, expressway 150m, ordinary road 500m, village (without building pressure) 500m, urban land (without building pressure) 2km, river 100m, fishpond 2 km.
And after the pipeline is solidified, sampling and detecting a part of the pipeline section.
And (3) detection results:
the filling degree of the high point of the pipeline is 96 percent, the filling degree of the low point of the pipeline is 100 percent, the filler has no water separation, the basic bearing capacity of the filler is 1100kPa, which is higher than the design requirement of the bearing capacity of the railway subgrade and the river bank foundation, and the porosity of the filler is lower than that of the dam, thus meeting the filling requirement.
Test example 4
The effect of the filler provided in example 1 on crops was verified.
A cylindrical pit of 1m diameter and 1m height was dug in the soil near the pipe and filled with the filler provided in example 1. After the solidification property of the filler is stable, planting corn and poplar seedlings in the filler.
Two control examples were set up, control 1 using the filler of comparative example 1 and control 2 using the filler of comparative example 2.
The compressive strength of the filler of the comparative example 1 after solidification is more than 4MPa, and crops cannot be directly planted. The solidified filler is ground to be consistent with the granularity of soil, and then corn and poplar seedlings are planted in the filler.
The filler of the comparative example 2 has a compressive strength of more than 8MPa after solidification, and can not be directly used for planting crops. The solidified filler is ground to be consistent with the granularity of soil, and then corn and poplar seedlings are planted in the filler.
Results of the experiment
Example 1 maize normally germinates and grows without death of the poplar within three months.
Comparative example 1: the corn normally germinates and grows, but cannot pass through the seedling stage, and the final growth height is less than 15 cm. The poplar died within 2 months.
The corn normally germinates and grows, but cannot pass through the seedling stage, and the final growth height is less than 10 cm. The poplar died within 1 month.
In summary, the embodiments of the present invention provide a method for treating a filler of a discarded pipe and a method for harmless treatment of a discarded pipe. Specifically, the filler comprises the following components in parts by weight: 10-100 parts of activated sludge, 20-50 parts of cement and 5-50 parts of solid matrix. The harmless treatment method of the scrapped pipeline fills the scrapped pipeline by using the filler rich in organic matters, the soil fertility is not influenced, after the filler in the pipeline is solidified, the compressive strength of the pipeline is higher than that of the soil and lower than that of the existing slurry after solidification, the volume is not shrunk, the ground is not collapsed, and the stability of ground surface bearing objects is not influenced.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A filler for treating a discarded pipe, wherein the filler comprises, in parts by weight: 10-100 parts of activated sludge, 20-50 parts of cement and 5-50 parts of solid matrix.
2. The filler for treating a scrapped pipe according to claim 1, wherein the filler comprises, in parts by weight: 40-100 parts of activated sludge, 30-50 parts of cement and 20-40 parts of solid matrix.
3. The filling for treating a rejected pipe as claimed in claim 1, wherein the filling further comprises one or more of lime, a thickener, a foaming agent and a retarder.
4. The filler for treating the scrapped pipe as claimed in claim 3, wherein the filler further comprises 0.1-10 parts by weight of lime, 0.1-5 parts by weight of a thickener, 0.1-15 parts by weight of a foaming agent and 0.1-2 parts by weight of a retarder;
preferably, the filler further comprises: 6-10 parts of lime, 1-5 parts of thickening agent, 1-5 parts of foaming agent and 1-2 parts of retarder.
5. The filler for treating abandoned pipelines according to claim 1, characterized in that the solid substrate is selected from fly ash or bentonite.
6. The filler for treating the abandoned pipeline according to any one of claims 1 to 5, wherein the filler further comprises water;
preferably, the filler further comprises 80-120 parts by weight of water.
7. A method for harmless treatment of a discarded pipe, comprising filling the discarded pipe with the filler for treating the discarded pipe according to any one of claims 1 to 6.
8. The method for harmless treatment of the discarded pipe according to claim 7, wherein the discarded pipe comprises: at least one of a gas conveying pipeline, an oil product conveying pipeline, a heating air conveying pipeline and a water conveying pipeline.
9. The method for harmless treatment of the discarded pipeline according to claim 7 or 8, wherein before the pipeline is filled, the method for harmless treatment comprises the steps of forming a grouting hole and an air outlet hole on the pipeline;
preferably, the grouting holes and the air outlet holes are arranged at two ends of the pipeline at intervals;
preferably, after the pipeline is filled, the harmless treatment method comprises the steps of sealing the grouting holes and the air outlet holes;
preferably, the method of sanitising comprises cleaning the pipeline prior to filling the pipeline.
10. The method according to claim 7 or 8, wherein the filler occupies 96 to 100% of the volume of the waste pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911116690.6A CN110759669A (en) | 2019-11-15 | 2019-11-15 | Filler for treating discarded pipeline and harmless treatment method of discarded pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911116690.6A CN110759669A (en) | 2019-11-15 | 2019-11-15 | Filler for treating discarded pipeline and harmless treatment method of discarded pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110759669A true CN110759669A (en) | 2020-02-07 |
Family
ID=69338362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911116690.6A Pending CN110759669A (en) | 2019-11-15 | 2019-11-15 | Filler for treating discarded pipeline and harmless treatment method of discarded pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110759669A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004189521A (en) * | 2002-12-10 | 2004-07-08 | Sumitomo Densetsu Corp | Slurry mortar |
| CN101381191A (en) * | 2008-10-24 | 2009-03-11 | 梁林华 | Sludge treatment method and sludge foaming lightweight concrete produced therefrom and use |
| CN108692129A (en) * | 2017-04-12 | 2018-10-23 | 管丽环境技术(上海)有限公司 | A kind of method of pipeline rehabilitation filling slip casting |
-
2019
- 2019-11-15 CN CN201911116690.6A patent/CN110759669A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004189521A (en) * | 2002-12-10 | 2004-07-08 | Sumitomo Densetsu Corp | Slurry mortar |
| CN101381191A (en) * | 2008-10-24 | 2009-03-11 | 梁林华 | Sludge treatment method and sludge foaming lightweight concrete produced therefrom and use |
| CN108692129A (en) * | 2017-04-12 | 2018-10-23 | 管丽环境技术(上海)有限公司 | A kind of method of pipeline rehabilitation filling slip casting |
Non-Patent Citations (1)
| Title |
|---|
| 徐华天等: "废弃油气管道注浆填充试验及分析", 《管道技术与设备》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Schijven et al. | Removal of microorganisms by deep well injection | |
| CN102139961B (en) | Multilayer vegetation zone water quality in situ purification method for highly polluted tributary inlet | |
| CN204498610U (en) | Saline land desalting system | |
| CN101143756A (en) | In situ collection and ecological processing method and device for residential area domestic garbage station percolate | |
| CN104041268A (en) | Breathing tunnel capable of enabling forests and greenbelts to grow at high speed and construction method thereof | |
| Nnadi et al. | Geotextile incorporated permeable pavement system as potential source of irrigation water: effects of re‐used water on the soil, plant growth and development | |
| CN112317532A (en) | Biological pile for repairing petroleum hydrocarbon polluted soil | |
| CN105772501A (en) | Phytoremediation method for underground soil pollution | |
| CN105123318A (en) | Ecological network ground weir type channel structure | |
| CN110759669A (en) | Filler for treating discarded pipeline and harmless treatment method of discarded pipeline | |
| CN109534434A (en) | A kind of production of ecological canal sewage-treatment plant and replacement method | |
| CN110990753B (en) | Method for calculating leaching effect of concealed pipe system | |
| CN102870651B (en) | Underground water storage infiltrating irrigation system | |
| Hallbeck | Principal organic materials in a repository for spent nuclear fuel | |
| CN105040629A (en) | Alternative water transfer method for west route water transfer | |
| JP3491949B2 (en) | Contaminated groundwater purification methods, contaminated groundwater purification structures, hazardous waste disposal sites and hazardous waste storage sites | |
| CN105152344B (en) | Arid area lakeside wetland alternation of wetting and drying Ecosystem restoration system | |
| Booth et al. | The reticulation of ethanol stillage through irrigation systems and its use for fertilisation of sugarcane in Zimbabwe | |
| CN209368013U (en) | Groundwater azotate tandem extracts coupled processing system out in situ | |
| CN106284278A (en) | A kind of ecological reestablishment for soil-body landslide and evaluation methodology | |
| CN106277108A (en) | A kind of multistage standard device in situ repairing heavy metal pollution in subsoil water | |
| CN102696297B (en) | Method for setting salt elimination system through closed conduit with external-wrapped filtering layer made of fluidized bed furnace slag | |
| CN205599660U (en) | Underground soil pollution's plant prosthetic devices | |
| Wiegant et al. | Steps towards groundwater-sensitive land use governance and management practices | |
| CN208754851U (en) | A kind of enhanced type mixed-matrix Rain Garden |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200207 |
|
| RJ01 | Rejection of invention patent application after publication |