CN101884989B - Method for dredging pressure guiding system by using high-pressure nitrogen backblowing - Google Patents
Method for dredging pressure guiding system by using high-pressure nitrogen backblowing Download PDFInfo
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- CN101884989B CN101884989B CN2010102082949A CN201010208294A CN101884989B CN 101884989 B CN101884989 B CN 101884989B CN 2010102082949 A CN2010102082949 A CN 2010102082949A CN 201010208294 A CN201010208294 A CN 201010208294A CN 101884989 B CN101884989 B CN 101884989B
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Abstract
The invention relates to a method for dredging a pressure guiding system by using high-pressure nitrogen backblowing, comprising the following steps: analyzing the current situation of the pressure guiding system to estimate the upper-limit pressure of nitrogen and establish a dredging scheme; preparing a set of device capable of supplying relevant-pressure nitrogen and carefully checking to ensure that each part is perfect and qualified; preparing a set of joint; after preparation, closing an instrument block valve to ensure that a drain valve and a root valve of the pressure guiding system are both opened; connecting a nitrogen outlet guide pipe with a drain guide pipe through the joint; opening an on/off valve and slowly opening a pressure reducer/a regulating valve to observe the change of the indication number of a pressure gage, wherein if the pressure does not change, it indicates that the pressure guiding system is still being dredged, and if the pressure suddenly and rapidly drops, it indicates that the pressure guiding system is dredged successfully; continuously blowing to accomplish the dredging of the pressure guiding system; after finishing dredging, dismantling each part of the air supply device, closing the pressure guiding system and opening the block valve to use the pressure guiding system again. The method can safely and easily remove obstructions and dredge pressure taking/sampling guide pipes without using special equipment and has the advantages of simple operation, economy and application, low cost, safety and reliability.
Description
Technical field
The present invention relates to the parts of instrument, relate in particular to the connecting pipe and the supporting valve of blending agent pressure, specifically, relate to the dredging method after these parts stop up
Background technology
In the Chemical Manufacture, the place that often utilizes conduit that processing medium is caused handled easily is measured or is taken a sample.Owing to multiple reason, the channel part of these pressures (or sampling) conduit, valve, pressure tappings usually can be blocked, and causes measuring undesired or can not take a sample.Run into this situation; Often need the technical staff to remove conduit with starting a section; Search stifled place, and then tamper is removed, in particular cases technical staff's poisonous and hazardous process equipment of entering of also having to take a risk with methods such as striking shake, intensification, flushing; Perhaps have to carry out dangerous operations such as high-altitude, also must carry out the destructiveness maintenance sometimes process equipment, lagging facility.Obviously, this had both wasted resource, had security risk in various degree again.
In the existing patent database, relating to the application part that utilizes the nitrogen dredging pipeline only has No. 200910052098 " COREX fusion reducing furnace dust pelletizing system blocking cleaning process ", No. 200910010470 " method and apparatus of blast furnace two-stage type blowing breeze ", No. 200920066425 " a kind of polymerization production vacuum system dredger ".Above-mentioned patented technology does not all belong to the mediation of instrument piping.Still do not have at present and use the blocked instrument piping of nitrogen mediation and the patent application part of valve.
Summary of the invention
The object of the present invention is to provide a kind of method of dredging pressure guiding system by using high-pressure nitrogen backblowing, to solve the mediation difficult problem of blocked instrument piping and valve.
The method that the inventor provides is: earlier pressure guiding system is carried out As-Is analysis, estimate the upper limit pressure of mediation with nitrogen, and formulate corresponding mediation scheme targetedly; Then, prepare the feeder that a cover can provide relevant pressure nitrogen, comprise the close/open valve of one of nitrogen steel cylinder, the indication of tape input pressure and each one in pressure reducer/control valve, two sections of the mediation air feed connecting pipes of band output pressure indication; Scrutiny guarantees that each parts is intact and qualified; Prepare process joint one cover that a cover can be complementary with conduit to be dredged again; After preparation is accomplished, close the stop valve of instrument, guarantee that blowoff valve and pressure guiding system root valve keep all opening; The dredging system delivery channel of dredging system nitrogen feeder is connected with drain guide pipe through the process joint that is complementary, check and guarantee safety, firmly, reliable; Open close/open valve, slowly open pressure reducer/control valve, and note observing the variation of its upward pressure table indication numerical value, and the authorized pressure will guarantee to indicate the numerical value maximum to be no more than ex ante analysis the time; Observe pressure changing, the variation if pressure does not descend keeps the mediation state, if pressure descends rapidly suddenly from a certain numerical value, shows and dredges successfully, continues to purge again, and accomplishes the pressure guiding system mediation; After mediation finishes, remove each parts of dredging system nitrogen feeder, close pressure guiding system, open stop valve, pressure guiding system comes into operation again.
The nitrogen pressure that above-mentioned nitrogen steel cylinder provides is 0.5MPa～2.5MPa.
The time that above-mentioned mediation state keeps is 3～10 minutes; The time of dredging successful continued purging is 2～5 minutes.
The method of dredging pressure guiding system by using high-pressure nitrogen backblowing of the present invention can be removed stifled thing, mediation pressure/sampling catheter safely, like a cork; Method is simple, need not special equipment, and is easy to operate; Do not need pressure/sampler or process equipment are painstakingly destroyed, economic and practical; Avoided dangerous operations such as high-altitude, made the mediation carrier with nitrogen, cost is low, and is safe and reliable.Be applicable to liquid, gas, the solution of latus rectum, perhaps wherein connecting pipe and the supporting valve of both or the pressure of the three's blending agent mediation after blocked of gas, liquid, solid at DN5.5～DN20.
Description of drawings
Fig. 1 is typical pressure guiding system sketch map, and Fig. 2 stops up the nitrogen feeder sketch map that uses for mediation.1 is process equipment among the figure, and 2 is the pressure guiding system root valve, and 3 is connecting pipe, and 4 is stop valve, and 5 are measurement/sampler, and 6 is blowoff valve, and 7 is the nitrogen steel cylinder; 8 close/open valves for the pressure indication; 9 is wireway; 10 pressure reducer/control valves for the pressure indication, 11 is drain guide pipe, 12 is delivery channel.
The specific embodiment
Embodiment: the pressure guiding system of dredging the connecting pipe obstruction of teletransmission pressure transmitter according to following steps:
1 pair of pressure guiding system is carried out As-Is analysis, estimates mediation and uses the upper limit pressure of nitrogen to be 2.5MPa, and make the mediation scheme targetedly;
2 prepare dredging system nitrogen feeder one cover like accompanying drawing 2; Comprise the close/open valve 8 of 7 one of nitrogen steel cylinders, the indication of tape input pressure and respectively one in pressure reducer/control valve 10,3 two sections of the mediation air feed connecting pipes of band output pressure indication; Confirm that each dribbleware is intact and qualified, guarantee that the air container internal gas pressure meets the requirements;
3 prepare a cover can with wait to dredge the joint that connecting pipe 3 or drain guide pipe 11 are complementary;
4 close stop valve 4, guarantee that blowoff valve 6 and pressure guiding system root valve 2 keep 100% aperture;
The 5 dredging system delivery channels 12 with dredging system nitrogen feeder are connected with drain guide pipe 11 through the process joint that is complementary, check and guarantee safety, firmly, reliable;
6 open close/open valve 8, slowly open pressure reducer/control valve 10, and note observing the variation of its upward pressure table indication numerical value, and will guarantee that the maximum of this indicating value is no more than authorized pressure 2.5MPa;
7 variations if pressure does not descend can keep 3～10 minutes, if pressure descends rapidly, showed and dredged successfully, continued purging again and promptly accomplished the pressure guiding system mediation in 2～5 minutes;
After 8 mediations finish, remove dredging system nitrogen feeder and annex, close pressure guiding system 6, open stop valve 4;
9 pressure guiding system come into operation again.
Claims (3)
1. the method for dredging pressure guiding system by using high-pressure nitrogen backblowing is characterized in that this method is: earlier pressure guiding system is carried out As-Is analysis, estimate the upper limit pressure of mediation with nitrogen, and formulate corresponding mediation scheme targetedly; Then, prepare the feeder that a cover can provide relevant pressure nitrogen, comprise the close/open valve of one of nitrogen steel cylinder, the indication of tape input pressure and each one in pressure reducer/control valve, two sections of the mediation air feed connecting pipes of band output pressure indication; Scrutiny guarantees that each parts is intact and qualified; Prepare process joint one cover that a cover can be complementary with conduit to be dredged again; After preparation is accomplished, close the stop valve of instrument, guarantee that blowoff valve and pressure guiding system root valve keep all opening; The dredging system delivery channel of dredging system nitrogen feeder is connected with drain guide pipe through the process joint that is complementary, check and guarantee safety, firmly, reliable; Open close/open valve, slowly open pressure reducer/control valve, and note observing the variation of its upward pressure table indication numerical value, and the authorized pressure will guarantee to indicate the numerical value maximum to be no more than ex ante analysis the time; Observe pressure changing, the variation if pressure does not descend keeps the mediation state, if pressure descends rapidly suddenly from a certain numerical value, shows and dredges successfully, continues to purge again, and accomplishes the pressure guiding system mediation; After mediation finishes, remove each parts of dredging system nitrogen feeder, close pressure guiding system, open stop valve, pressure guiding system comes into operation again.
2. the method for claim 1 is characterized in that the nitrogen pressure that said nitrogen steel cylinder provides is 0.5MPa～2.5MPa.
3. the method for claim 1 is characterized in that the time that said mediation state keeps is 3～10 minutes; The time of dredging successful continued purging is 2～5 minutes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102082949A CN101884989B (en) | 2010-06-24 | 2010-06-24 | Method for dredging pressure guiding system by using high-pressure nitrogen backblowing |
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| CN2010102082949A CN101884989B (en) | 2010-06-24 | 2010-06-24 | Method for dredging pressure guiding system by using high-pressure nitrogen backblowing |
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| CN101884989A CN101884989A (en) | 2010-11-17 |
| CN101884989B true CN101884989B (en) | 2012-01-25 |
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| CN104019361A (en) * | 2014-06-10 | 2014-09-03 | 中国海洋石油总公司 | Online unclogging device for small-size valves |
| CN104132247B (en) * | 2014-07-07 | 2017-06-13 | 中国寰球工程公司 | The long-range pressure line protection device of pilot operated safety valve |
| CN106755675A (en) * | 2016-11-18 | 2017-05-31 | 内蒙古包钢钢联股份有限公司 | The method of breeze blowing pipe-line system and quick treatment coal spraying pipeline Severe blockage |
| CN110014002B (en) * | 2019-05-22 | 2021-09-28 | 中南大学 | Dredging device and method for parallel multi-path small-caliber pressure measurement pressure guide hose |
| CN112916544B (en) * | 2019-12-06 | 2022-07-05 | 中国石油天然气股份有限公司 | Blockage removing device and blockage removing method for condensate cylinder |
| CN113048407A (en) * | 2021-03-18 | 2021-06-29 | 中国商用飞机有限责任公司 | System for detecting and dredging blockage point of aircraft waste water pipeline and control method thereof |
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| CN201102027Y (en) * | 2007-11-20 | 2008-08-20 | 中国石化集团胜利石油管理局黄河钻井总公司钻前公司 | Device for removing obstructions in waste pipe with high pressure gas |
| CN101480653A (en) * | 2009-02-20 | 2009-07-15 | 中冶实久建设有限公司南京分公司 | Nitrogen purging device of hydraulic line and method for cleaning hydraulic line |
| CN201427121Y (en) * | 2009-03-06 | 2010-03-24 | 范经刚 | High-pressure air impulse pipeline cleaning device |
| CN201410485Y (en) * | 2009-06-04 | 2010-02-24 | 广州创特技术有限公司 | Air conveying cleaning device |
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Address after: 550500 Guizhou Province, Qiannan Buyei and Miao Autonomous Prefecture Fuquan Racecourse town Yingbin Road No. 1 Wengfu group Patentee after: WENGFU GROUP Co.,Ltd. Address before: 23, 550002 floor, urn Fuk international, No. 57, South City Road, Guizhou, Guiyang Patentee before: WENGFU GROUP Co.,Ltd. |
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