CN104033728B - A kind of discarded steel cylinder processing method - Google Patents
A kind of discarded steel cylinder processing method Download PDFInfo
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- CN104033728B CN104033728B CN201410269978.8A CN201410269978A CN104033728B CN 104033728 B CN104033728 B CN 104033728B CN 201410269978 A CN201410269978 A CN 201410269978A CN 104033728 B CN104033728 B CN 104033728B
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- steel cylinder
- valve
- gas
- discarded
- pipeline
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 109
- 239000010959 steel Substances 0.000 title claims abstract description 109
- 238000003672 processing method Methods 0.000 title claims abstract description 21
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 56
- 239000007789 gas Substances 0.000 claims abstract description 48
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 28
- 238000012545 processing Methods 0.000 claims abstract description 14
- 238000012360 testing method Methods 0.000 claims abstract description 12
- 238000006073 displacement reaction Methods 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 11
- 238000005070 sampling Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 238000005553 drilling Methods 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 239000002341 toxic gas Substances 0.000 abstract description 15
- 238000000034 method Methods 0.000 abstract description 10
- 238000001514 detection method Methods 0.000 abstract description 5
- 239000007921 spray Substances 0.000 description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000013022 venting Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 230000007096 poisonous effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000005201 scrubbing Methods 0.000 description 2
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
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- Processing Of Solid Wastes (AREA)
Abstract
The present invention relates to a kind of discarded steel cylinder processing method, comprise the steps: (1), whole discarded steel cylinder treatment system is installed; (2), steel cylinder is installed and is processed pipeline, valve and Pressure gauge; (3), airtight test; (4), gas displacement repeatedly; (5), airtight test again; (6), detect the gas in discarded steel cylinder; (7), the gas detecting in (6) step is processed; (8), emergency processing; (9), site clearing. The device that the present invention uses first adopts nitrogen to carry out safety detection, adopt afterwards the mode that is filled with nitrogen that toxic gas is cemented out, finally toxic gas is taked the method for physics or chemistry to dispose, also be provided with emergency shower device and SS simultaneously, ensured the safe and reliable of whole system.
Description
Technical field
The invention belongs to energy-conserving and environment-protective technical field, be specifically related to a kind of nitrogen that adopts and carry out safety detection, itThe mode that rear employing is filled with nitrogen cements out toxic gas, finally toxic gas is taked to physics or chemistryThe discarded steel cylinder processing method disposed of method.
Background technology
Pressure gas cylinder kind is numerous and diverse, comprises poisonous/hypertoxic gas, inflammable gas, oxidizing gas, corruptionErosion property gas and simple asphyxiant gas etc., the existing single gaseous mixture that also has. Discarded gas cylinder is more because of yearIn generation, is remote, and kind is not clear, adds valve corrosion, has higher potential risk, carries out the peace of discarded steel cylinderFull disposal is an indispensable vital task guaranteeing urban safety.
Wherein a small amount of steel cylinder composition is not clear, and major part belongs to poisonous or hypertoxic gas, and the task of top priority is to seekAsk method of disposal safely and effectively, eliminate potential danger source.
Summary of the invention
For the problems referred to above, main purpose of the present invention is to provide a kind of nitrogen that adopts to carry out safety detection,Adopt afterwards the mode that is filled with nitrogen that toxic gas is cemented out, finally toxic gas is taked to physics or changeThe discarded steel cylinder processing method that the method for learning is disposed.
The present invention solves above-mentioned technical problem by following technical proposals: a kind of discarded steel cylinder processing sideMethod, is characterized in that: described discarded steel cylinder processing method comprises the steps:
(1), whole discarded steel cylinder treatment system is installed;
(2), steel cylinder is installed and is processed pipeline, valve and Pressure gauge;
(3), airtight test;
(4), gas displacement repeatedly;
(5), airtight test again;
(6), detect the gas in discarded steel cylinder;
(7), the gas detecting in (6) step is processed;
(8), emergency processing;
(9), site clearing.
In a preferred embodiment of the present invention, the discarded steel cylinder treatment system in step (1) comprises folderThe steel cylinder fixture of living discarded steel cylinder, steel cylinder fixture is fixed on fixed head, and steel cylinder fixture will be discarded steel cylinder and clampAfter be placed on sealing steel cylinder dispose in pond, the top that steel cylinder is disposed pond is provided with electric drill entrance, electric drill entranceAnd between discarded steel cylinder, be provided with the steel cylinder electric drill device of holing on discarded steel cylinder; Steel cylinder is disposed on pond and is also establishedBe equipped with some SSs, on SS, be connected with suction channel, suction valve is installed on suction channel, uselessAbandon steel cylinder processing method and also comprise that being arranged on steel cylinder disposes the emergency shower device of top, pond.
In a preferred embodiment of the present invention, described steel cylinder fixture comprises fixing discarded steel cylinder topThe lower clamp of upper fixture and fixing discarded steel cylinder bottom.
In a preferred embodiment of the present invention, described steel cylinder electric drill device comprises: high pressure sealing drill bushingDrilling rod with inserting in high pressure sealing drill bushing, adopts tetrafluoro packing_seal between high pressure sealing drill bushing and drilling rod.
In a preferred embodiment of the present invention, steel cylinder processing pipeline, valve and Pressure gauge are installed concreteComprise: the pipeline that in discarded steel cylinder, gas is gone out is installed, between the gas export mouth on pipeline and pipeline, is installedThere are the first valve and the 3rd valve, on the pipeline between the first valve and the 3rd valve, separate two branch pipe(tube)s, pointThe second valve on gas sampled pipeline is not installed and is passed into the 4th valve on nitrogen pipeline;
Airtight test comprises: from the outlet pipe laying of steel cylinder electric drill device, on the pipeline of the 4th valvePass into nitrogen, first carry out pipeline air-tight test with nitrogen, when steel cylinder Pressure gauge is shown as zero, pressure-reducing valve is pressedPower be 0.02Mpa think and pipeline in while flowing out without gas;
Gas displacement repeatedly comprises: close the second valve, the 3rd valve, opens the first valve and the 4th valve,After passing into the nitrogen regular hour, turn off the 4th valve and the 3rd valve, open the first valve and the second valve,In sample tap sampling, after sampling, obtain after the composition of gas processing at the cleanup standard according to gas again.
Positive progressive effect of the present invention is: discarded steel cylinder processing method provided by the invention has following excellentPoint: the present invention first adopts nitrogen to carry out safety detection, adopts the mode that is filled with nitrogen that toxic gas is put afterwardsSwap out, finally toxic gas is taked the method for physics or chemistry to dispose, the present invention simultaneously disposes on pondSide arrange emergency shower device, just in case steel cylinder occur leak time, can prevent toxic gas spread. ThisBrightly pond bottom (major part has poison gas to be all heavier than air) and upper edge hole, 2 SSs are set, just in case steel cylinderWhile occurring to leak, toxic gas can be pumped to scrubbing tower neutralization.
Brief description of the drawings
Fig. 1 is the general structure schematic diagram of discarded steel cylinder processing method.
Fig. 2 is the structural representation that takes out gas in discarded steel cylinder processing method.
Detailed description of the invention
Provide preferred embodiment of the present invention below in conjunction with accompanying drawing, to describe technical scheme of the present invention in detail.
Fig. 1 is the general structure schematic diagram of discarded steel cylinder processing method, as shown in Figure 1: the present invention includes folderThe steel cylinder fixture 2 of living discarded steel cylinder 1, steel cylinder fixture 2 is fixed on fixed head 3, and steel cylinder fixture 2 will be discardedSteel cylinder 1 is placed on the steel cylinder of sealing and disposes in pond 4 after clamping, the top that steel cylinder is disposed pond 4 is provided with electric drillEntrance 401, is provided with the steel cylinder electricity of holing on discarded steel cylinder 1 between electric drill entrance 401 and discarded steel cylinder 1Boring device 6; Steel cylinder is disposed on pond 4 and is also provided with some SSs 402, on SS 402, is connected with suctionPipeline 403, is provided with suction valve 404 on suction channel 403, discarded steel cylinder processing method also comprises installationEmergency shower device 5 above steel cylinder is disposed pond 4. Steel cylinder fixture 2 comprises fixing discarded steel cylinder 1 topThe lower clamp 202 of upper fixture 201 and fixing discarded steel cylinder 1 bottom.
Fig. 2 is the structural representation that takes out gas in discarded steel cylinder processing method, as shown in Figure 2: discarded steelThe processing procedure of taking-up gas of bottle processing method is as follows: will discard steel cylinder 1 and be placed on steel cylinder to dispose pond 4 interior solidFix on fixed head 3, install steel cylinder electric drill device 6, the first valve 9 shown in installation diagram 2, second valveDoor 10, the three valve 11, the four valves 12, from the outlet pipe laying 8 of steel cylinder electric drill device 6, theOn the pipeline of four valves 12, pass into nitrogen, first carry out pipeline air-tight test with nitrogen, when steel cylinder Pressure gauge 13Be shown as zero, pressure-reducing valve pressure be 0.02Mpa think and pipeline in while flowing out without gas, close the valve of giving vent to anger,Open nitrogen valve, in steel cylinder, be filled with nitrogen, regulate pressure to continue venting at 0.1Mpa, close second valveDoor 10, the three valves 11, open the first valve 9 and the 4th valve 12, close after passing into the nitrogen regular hourFall the 4th valve 12 and the 3rd valve 11, open the first valve 9 and the second valve 10, get at sample tap 14Sample, obtains after sampling after the composition of gas processing at the cleanup standard according to gas again.
Specific embodiment below:
In earlier stage Borehole Disposal:
1, will discard steel cylinder and fix in disposal pond, and install high pressure sealing drill bushing and electric drill, Long-distance Control is opened in runinThe electric drill of feed function:
2, stop valve pressure-reducing valve, flowmeter, connection gas path pipe are installed, are first carried out pipeline air-tightness with nitrogenTest, then connects the pressure-conducting valve of being disposed on steel cylinder.
3, spray pump and air-introduced machine in opening protection function pond;
4, carry out withstand voltage test and inert gas replacement to nitrogen injection in high pressure sealing drill bushing;
Preparation before processing:
1, operating personnel have dressed protective articles and (protective garment, breathing mask, soak and mould gloves, portable oxygen supplyRespirator) be equipped with the personnel of monitoring simultaneously.
2, the processing of residue in discarded steel cylinder;
2.1,, when burning disposal spontaneous combustion state, dual firing chamber's pressure calibration is at-8～-12mmH2When O, open wholeGas circuit angle valve, passes into nitrogen, by sodium dodecyl sulfate aqueous solution inspection interface air-tightness. If checkedIntact, close nitrogen valve, the electric drill of Long-distance Control feed function is opened in runin, and steel cylinder is drilled through.
2.2, opening pressure-reducing valve needle valve adjustments of gas pressure is that 0.1Mpa starts venting, again checks interfaceThe air-tightness of place and connecting line.
2.3, when steel cylinder pressure is shown as zero, pressure-reducing valve pressure be 0.02Mpa think and pipeline in without gas flowWhile going out, close the valve of giving vent to anger, open nitrogen valve, in steel cylinder, be filled with nitrogen, regulate pressure at 0.1MpaContinue venting.
2.4, three replacement operators repeatedly, constantly inflation/deflation, finishes displacement work.
2.5, check steel cylinder interface per half an hour with gas piping air-tightness once, leak egoistic pass as foundClose pressure-conducting valve.
2.6,, to replacement completion, in the time that the Pressure gauge of organic gas residue steel cylinder is shown as zero, close pilotValve.
2.7, meet that burner is flame-out, quick-fried stove, be greater than-4mmH of dual firing chamber's pressure2O closes pressure-conducting valve immediately.
2.8, fill in strictly according to the facts " fuel gas processing original record "
3, the absorption spray cleaning of tail gas operation:
3.1, spray column operation
(1) start centrifugal pump, now centrifugal pump pressure is at 2KG/cm2Left and right.
(2) after having fluid-tight, spray column water outlet opens incinerator system.
(3) observe centrifugal pump operating pressure, spray column outlet temperature and water yield change, as above-mentioned data variationWhen larger, need to check whether centrifugal pump normally works, and whether spray nozzle stops up, entering centrifugal pump fault needs to openStand-by pump, enters spray nozzle and stops up dredging in time.
(4) observe spray liquid pH value and change, as pH value is less than at 10 o'clock, need adds liquid caustic soda and be adjusted to 12 left and right.
Check steel cylinder interface per half an hour with gas piping air-tightness once, leak and close and lead immediately as foundPressure valve.
To replacement completion, in the time that the Pressure gauge of organic gas residue steel cylinder is shown as zero, close pressure-conducting valve.
Meet that burner is flame-out, quick-fried stove, be greater than-4mm of dual firing chamber's pressure water close pressure-conducting valve immediately.
If without any abnormal conditions, continue to repeat the step of above-mentioned processing gas.
Process gas and generally adopt the method for burning to carry out, adopt and be arranged on the urgent of steel cylinder disposal 4 tops, pondSpray equipment 5 sprays, and changes if observe spray liquid pH value, processes, until locate according to pH valueThe emission of reason reaches discharge standard.
In addition, the present invention disposes the emergency shower device 5 that pond top arranges, just in case while there is leakage in steel cylinder, and canTo prevent toxic gas diffusion.
In bottom, pond (major part has poison gas to be all heavier than air) and upper edge hole, 2 SSs 402 are set, just in caseWhen steel cylinder occurs to leak, toxic gas can be pumped to scrubbing tower neutralization.
The device that the present invention uses first adopts nitrogen to carry out safety detection, adopts afterwards the mode that is filled with nitrogen to incite somebody to actionToxic gas cements out, and finally toxic gas is taked the method for physics or chemistry to dispose, and also establishes simultaneouslyPut emergency shower device and SS, ensured the safe and reliable of whole system.
More than show and described general principle of the present invention and principal character and advantage of the present invention. The industryTechnical staff should understand, the present invention is not restricted to the described embodiments, in above-described embodiment and descriptionThat describes just illustrates principle of the present invention, without departing from the spirit and scope of the present invention, and the present inventionAlso have various changes and modifications, these changes and improvements all fall in the claimed scope of the invention, thisInventing claimed scope is defined by appending claims and equivalent thereof.
Claims (5)
1. a discarded steel cylinder processing method, is characterized in that: described discarded steel cylinder processing method comprises the steps:
(1), whole discarded steel cylinder treatment system is installed;
(2), steel cylinder is installed and is processed pipeline, valve and Pressure gauge;
(3), airtight test;
(4), gas displacement repeatedly;
(5), airtight test again;
(6), detect the gas in discarded steel cylinder;
(7), the gas detecting in (6) step is processed;
(8), emergency processing;
(9), site clearing.
2. discarded steel cylinder processing method according to claim 1, it is characterized in that: the discarded steel cylinder treatment system in step (1) comprises the steel cylinder fixture of clamping discarded steel cylinder, steel cylinder fixture is fixed on fixed head, steel cylinder fixture is placed on the steel cylinder of sealing and disposes in pond after discarded steel cylinder is clamped, the top that steel cylinder is disposed pond is provided with electric drill entrance, is provided with the steel cylinder electric drill device of holing on discarded steel cylinder between electric drill entrance and discarded steel cylinder; Steel cylinder is disposed on pond and is also provided with some SSs, is connected with suction channel on SS, and suction valve is installed on suction channel, and discarded steel cylinder processing method also comprises that being arranged on steel cylinder disposes the emergency shower device of top, pond.
3. discarded steel cylinder processing method according to claim 2, is characterized in that: described steel cylinder fixture comprises the upper fixture on fixing discarded steel cylinder top and the lower clamp of fixing discarded steel cylinder bottom.
4. discarded steel cylinder processing method according to claim 2, is characterized in that: described steel cylinder electric drill device comprises: the drilling rod in high pressure sealing drill bushing and insertion high pressure sealing drill bushing, adopts tetrafluoro packing_seal between high pressure sealing drill bushing and drilling rod.
5. discarded steel cylinder processing method according to claim 1, it is characterized in that: steel cylinder processing pipeline, valve and Pressure gauge are installed and are specifically comprised: the pipeline that in discarded steel cylinder, gas is gone out is installed, the first valve and the 3rd valve are installed between the gas export mouth on pipeline and pipeline, on pipeline between the first valve and the 3rd valve, separate two branch pipe(tube)s, the second valve on gas sampled pipeline is installed respectively and is passed into the 4th valve on nitrogen pipeline;
Airtight test comprises: from the outlet pipe laying of steel cylinder electric drill device, on the pipeline of the 4th valve, pass into nitrogen, first carry out pipeline air-tight test with nitrogen, when steel cylinder Pressure gauge is shown as zero, pressure-reducing valve pressure is while flowing out without gas in 0.02Mpa and pipeline;
Gas displacement repeatedly comprises: close the second valve, the 3rd valve, open the first valve and the 4th valve, after passing into the nitrogen regular hour, turn off the 4th valve and the 3rd valve, open the first valve and the second valve, in sample tap sampling, after sampling, obtain processing according to the cleanup standard of gas again after the composition of gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410269978.8A CN104033728B (en) | 2014-06-17 | 2014-06-17 | A kind of discarded steel cylinder processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410269978.8A CN104033728B (en) | 2014-06-17 | 2014-06-17 | A kind of discarded steel cylinder processing method |
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| Publication Number | Publication Date |
|---|---|
| CN104033728A CN104033728A (en) | 2014-09-10 |
| CN104033728B true CN104033728B (en) | 2016-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410269978.8A Active CN104033728B (en) | 2014-06-17 | 2014-06-17 | A kind of discarded steel cylinder processing method |
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| CN (1) | CN104033728B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108927392B (en) * | 2018-06-13 | 2020-01-07 | 福建省锅炉压力容器检验研究院 | Method for realizing flowing type cleaning of gas tank |
| CN110420943B (en) * | 2019-08-30 | 2024-05-31 | 金宏气体股份有限公司 | Device and method for removing solid particles in ultra-high purity ethyl silicate steel cylinder |
| CN115419823B (en) * | 2022-09-20 | 2023-07-21 | 济南德洋特种气体有限公司 | Gas cylinder filling tracking management system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101358948A (en) * | 2008-08-21 | 2009-02-04 | 华中科技大学 | Device for detecting metal body of underground gas storage well |
| CN102494246A (en) * | 2011-12-16 | 2012-06-13 | 重庆市计量质量检测研究院 | Integrated gas dispenser detection device through standard meter method |
| CN102853252A (en) * | 2012-08-31 | 2013-01-02 | 成都爱德工程有限公司 | Method of replacing steel cylinder for high-purity safe special gas |
| CN102887617A (en) * | 2011-07-18 | 2013-01-23 | 方运平 | Integrated device for combustible gas recovering and sludge drying in waste landfill site |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59187178A (en) * | 1983-04-08 | 1984-10-24 | Chuo Sansho Kk | Gas safety device |
-
2014
- 2014-06-17 CN CN201410269978.8A patent/CN104033728B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101358948A (en) * | 2008-08-21 | 2009-02-04 | 华中科技大学 | Device for detecting metal body of underground gas storage well |
| CN102887617A (en) * | 2011-07-18 | 2013-01-23 | 方运平 | Integrated device for combustible gas recovering and sludge drying in waste landfill site |
| CN102494246A (en) * | 2011-12-16 | 2012-06-13 | 重庆市计量质量检测研究院 | Integrated gas dispenser detection device through standard meter method |
| CN102853252A (en) * | 2012-08-31 | 2013-01-02 | 成都爱德工程有限公司 | Method of replacing steel cylinder for high-purity safe special gas |
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| CN104033728A (en) | 2014-09-10 |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20150924 Address after: 201308, A-759, room 1, 1758 Hong Kong Road, Nanhui new town, Shanghai, Pudong New Area Applicant after: SHANGHAI TIANHAN ENVIRONMENTAL RESOURCES Co.,Ltd. Address before: 201411, Shanghai, Fengxian District town of love Village Applicant before: Shanghai Jieshen Industrial Co.,Ltd. |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Commission number: 4W114744 Conclusion of examination: Declare Claim 1 of Invention Patent No. 201410269978.8 invalid, and continue to maintain the validity of this patent on the basis of Claims 2-5 Decision date of declaring invalidation: 20230529 Decision number of declaring invalidation: 560657 Denomination of invention: A method for disposing of discarded steel cylinders Granted publication date: 20160518 Patentee: SHANGHAI TIANHAN ENVIRONMENTAL RESOURCES Co.,Ltd. |
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| IP01 | Partial invalidation of patent right |