CN104502040A - Pressure maintaining and leakage testing method of purification changeover valves for oxygen generation - Google Patents
Pressure maintaining and leakage testing method of purification changeover valves for oxygen generation Download PDFInfo
- Publication number
- CN104502040A CN104502040A CN201410844264.5A CN201410844264A CN104502040A CN 104502040 A CN104502040 A CN 104502040A CN 201410844264 A CN201410844264 A CN 201410844264A CN 104502040 A CN104502040 A CN 104502040A
- Authority
- CN
- China
- Prior art keywords
- valve
- pressure
- molecular sieve
- leak
- swing
- 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.)
- Granted
Links
Landscapes
- Separation Of Gases By Adsorption (AREA)
Abstract
The invention discloses a pressure maintaining and leakage testing method of purification changeover valves for oxygen generation. After an air separation unit is stopped, a whole system stops working; follow-up pressure maintaining and leakage testing are performed under the condition that valve switches are controlled manually; the pressure of an air compressor is 0.45mpa; pressure measuring instruments PI-1201 and PI-1202 are observed to judge whether the valves leak or not ; the pressure of the air compressor still exists; according to opening and closing conditions of the valves, whether the valves leak or not is detected through pressure changes caused by flowing of air in pipelines. The pressure maintaining and leakage testing method has the advantages that maintenance is achieved without valve demounting, the defects that shutdown is needed for demounting of the valves and equipment is needed for detection in the prior art are avoided, normal operation of an oxygenator can be guaranteed effectively, shutdown time is reduced, production of steel mills is not affected, and hoisting for valve demounting is reduced.
Description
Technical field
The present invention relates to oxygen valve service technique field, be specifically related to a kind of oxygen purifying transfer valve pressurize leak testing process.
Background technology
Lian Zha factory oxygen operation area 20,000 sieve purification system, be start for 2008, Yuan Kongfen company limited of effluent Nankai establishes.Because sieve purification system valve working environment is relatively more severe, during normal production, gas is 8-15 DEG C by the temperature of valve, and during regenerating molecular sieve, gas temperature is 190-200 DEG C, and during molecular sieve cold blowing, temperature is minimum is-15 DEG C, and the environment of its work is comparatively disliked slightly.This batch of valve is for a long time at working at high/low temp. condition, in valve easily there is fatigue phenomenon in sealing, filler, packing ring etc., clamping stagnation, action are dumb, internal leakage to cause valve often to occur in operational process, time serious, gases at high pressure bleed low pressure end, cause the take-off of molecular sieve in-line relief valve, air separation unit such as can not to produce at the serious problems.
Sieve purification system is one of important step of supporting oxygen air separation unit operation, Main Function removes the hydrocarbon such as moisture, carbon dioxide, acetylene in air, for the pressurized air that air separation unit conveying is pure, qualified, lay the foundation for air separation unit oxygen nitrogen and argon is separated.Sieve purification system has 14 valves, and by set program, time switch realizes a job, a regeneration, and the mode switched in parallel, ensures that air separation unit runs without interruption continuously.Purification system valve runs to some cycles, needs pressurize leak test, and way was after being removed by 14 valves in the past, utilize the carrying out of equipment valve one by one to check, overhaul, certainly will stop production causing oxygen, needing a large amount of costs of labor, and whole steel mill stops production, and loses inestimable; Dismantle valve to waste time and energy simultaneously; increase the workload of workman; have and need other equipment to detect; add the cost of equipment; by online pressurize, leak test, can the normal operation of effective guarantee oxygenerator, the both power generating ratio time; do not delay steel mill to produce, also reduce the lifting work of dismounting valve simultaneously.To the valve occurring leaking, can process when company's normal service.
Online pressure testing of the present invention, leak test scheme, accurately can detect which deck valve door breaks down, glitch can process online, and major break down can guard operation, waits during company organization's overhaul and processes.Reduce nonscheduled down time, the effective guarantee normal production of oxygenerator, reach continuously uninterrupted object of producing.
Summary of the invention
Problem to be solved by this invention is to provide a kind of oxygen purifying transfer valve pressurize leak testing process; accurately can detect which deck valve door breaks down; glitch can process online; major break down can guard operation; by online pressurize, leak test, can the normal operation of effective guarantee oxygenerator, the both power generating ratio time; do not delay steel mill to produce, also reduce the lifting work of dismounting valve simultaneously.
A kind of oxygen purifying transfer valve pressurize leak testing process, comprises the following steps:
1) whether, after air separation unit is shut down, air compressor machine does not stop, all valve complete shut-downs, keep air compressor machine pressure to be 0.45mpa, leak PI-1201 and PI-1202 pressure instrumentation observe and decide valve;
2) fractionator pressure is kept to be 0.1-0.2mpa, observe 1, No. 2 molecular sieve pressure whether to go up, time is 20min, if 1, No. 2 molecular sieve pressure do not go up, then v1201 valve, v1202 valve are not revealed, if No. 1 molecular sieve pressure goes up, then and v1201 valve leak, if No. 2 molecular sieve pressure go up, then v1202 valve leak;
3) open the v1201 valve of No. 1 molecular sieve, observe No. 2 molecular sieve pressure and whether go up, if go up, v1209 valve leak;
4) after No. 1 molecular sieve pressure is stable, open v1204 valve, if No. 2 molecular sieve pressure go up, v1203 valve leak, after judgement, closes v1204 valve;
5) after v1204 valve closing, open v1206 valve, now remove in TIAS1223, TIAS1224, TIAS1225 tri-electrical heating points for measuring temperature, and cloth is placed on remove point observe whether swing, if do not swing, then v1205 valve is not revealed, if swing, then v1205 valve leaks, after judgement, closes v1206 valve;
6) cloth is placed on purifying silencing end, whether the cloth observing purifying silencing end swings, if do not swing, v1207 valve, v1210 valve are not revealed, if swing, and v1207 valve, v1210 valve leaks;
7) open the v1202 valve of No. 2 molecular sieve, after No. 2 molecular sieve pressure are stable, open v1203 valve, if No. 1 molecular sieve pressure goes up, v1204 valve leak, after judgement, closes v1203 valve;
8) after v1203 valve closing, open v1205 valve, now remove in TIAS1223, TIAS1224, TIAS1225 tri-electrical heating points for measuring temperature, and cloth is placed on remove point observe whether swing, if do not swing, then v1206 valve is not revealed, if swing, then v1206 valve leaks, after judgement, closes v1205 valve;
9) cloth is placed on purifying silencing end, whether the cloth observing purifying silencing end swings, if do not swing, v1208 valve, v1211 valve are not revealed, if swing, and v1208 valve, v1211 valve leaks.
Further, when using cloth to judge whether leakage, cloth is tied up and detects in bamboo pole front end.
Further, when detecting certain valve leak, this valve is keeped in repair or changed, then carry out next step pressurize leak test work.
Further, any one point in TIAS1223, TIAS1224, TIAS1225 tri-electrical heating points for measuring temperature installs PI-1203 pressure instrumentation, for v1205 valve and v1206 valve whether Leak Detection time, replace cloth to observe by PI-1203 pressure instrumentation.
The molecular sieve purifier of native system is two groups, horizontal, hydrostatic column, is all filled with 13X ∽ APG, 4x8 order, 9700kg adsorbent of molecular sieve in every container.When air is by mol sieve beds, due to the characterization of adsorption of molecular sieve, by hydrocarbons adsorb such as H2O, CO2, the C2H2 in air, air is purified, through adsorbing after a while, just proceeding in the regeneration period, first oppositely being regenerated by the dirty nitrogen of high temperature drying, dried dirty nitrogen is cooled to normal temperature again, makes adsorbent of molecular sieve separate out H2O, CO2 and hydrocarbon etc.Molecular sieve after regeneration can drop into again new absorption work.Molecular sieve purifier is used alternatingly in pairs, and during a job, another is in regeneration.
Beneficial effect of the present invention: the present invention does not need to remove each valve just to detect the performance of valve, detects whether each valve exists leakage by pressurize leak test, ensures carrying out smoothly of production.After air separation unit is shut down, whole system quits work, follow-up pressurize leak test work carries out when manually operated control valve door switch, air compressor machine pressure is 0.45mpa, whether PI-1201 and PI-1202 pressure instrumentation observe and decide valve is leaked, air compressor machine still also exists pressure, whether each valve of pressure detection that can bring according to the circulation of gas in pipelines exists leakage, can realize not removing valve to overhaul, avoiding original technology needs stopping production to remove and the weak point using equipment to detect each valve, save a large amount of costs of labor, and pressurize leak testing process is more easily convenient to regular the overhauling system valve of workman, reduce the probability broken down when equipment runs, improve the benefit of factory.
By cloth any one dismounting point in purifying silencing end or TIAS1223, TIAS1224, TIAS1225 tri-electrical heating points for measuring temperature, when valve has leakage, gas flowing is had in pipeline, if cloth occurs swinging after placing, then illustrating in pipeline has gas to flow, just indirectly reflect the situation that there is valve leak, this method can to detect with PI-1201 and PI-1202 pressure instrumentation without other valve contacted directly, and achieves the valve detection to all purification systems.When using cloth to detect, cloth can be wrapped in bamboo pole or other some stock tops, the end of the hand-held stock of workman, this method reduces the danger of workman during pressurize leak test, directly can not be blown to by the gas of pipeline internal leakage, ensure that the security that workman works.
When carrying out pressurize leak test to valve, if detect there is leakage in certain valve, just need to keep in repair this valve or change, because follow-up valve pressurize leak test needs to ensure that pent valve very closes to there is not leakage phenomenon, it is not leaking gas to only have the valve revealed existence to repair or replace rear guarantee, pressurize leak test could be carried out to follow-up valve, ensure the correctness of testing result.
Any one point in TIAS1223, TIAS1224, TIAS1225 tri-electrical heating points for measuring temperature installs PI-1203 pressure instrumentation; v1205 valve can be detected intuitively or whether v1206 valve exists leakage problem by pressure instrumentation; eliminate the trouble of removing electrical heating point for measuring temperature; accelerate the operating rate of pressurize leak test; decrease system downtime, improve the benefit of factory.
The present invention accurately can detect which deck valve door breaks down, and glitch can process online, and major break down can guard operation; by online pressurize, leak test, can the normal operation of effective guarantee oxygenerator, the both power generating ratio time; do not delay steel mill to produce, also reduce the lifting work of dismounting valve simultaneously.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described:
Fig. 1 is the system construction drawing of oxygen purification system of the present invention.
Embodiment
That Fig. 1 shows is the annexation figure of this oxygen purification system purifying valve, by realizing the pressurize leak test to each valve to the operation of these valves.
Embodiment one
The invention provides a kind of oxygen purifying transfer valve pressurize leak testing process, comprise the following steps:
1) after air separation unit is shut down, air compressor machine does not stop, all valve complete shut-downs, air compressor machine pressure is kept to be 0.45mpa, whether PI-1201 and PI-1202 pressure instrumentation observe and decide valve is leaked, by the change to ensuing valve switch adjustment and pressure instrumentation, whether valve is leaked and detects;
2) fractionator pressure is kept to be 0.1-0.2mpa, normal temperature valve is prevented to be not closed completely, cryogenic gas flows backwards, fractionator is caused and damages or cause stopping accident, observe 1, No. 2 molecular sieve pressure whether to go up, time is 20min, if 1, No. 2 molecular sieve pressure do not go up, then explanation v1201 valve, v1202 valve do not have gas to pass through, and now all valves are in off position, and just explanation v1201 valve, v1202 valve do not exist leakage, if No. 1 molecular sieve pressure goes up, then v1201 valve leak, if No. 2 molecular sieve pressure go up, then v1202 valve leak;
3) the v1201 valve of No. 1 molecular sieve is opened, observe No. 2 molecular sieve pressure whether to go up, if go up, v1209 valve leak, No. 1 molecular sieve and No. 2 molecular sieve are linked together by v1209 valve, when v1201 valve open carries out pressurising to No. 1 molecular sieve, if there are not the words of leakage in v1209 valve, the situation of pressure increase can not be there is in No. 2 molecular sieve, only have v1209 valve to exist to leak, No. 1 molecular sieve is communicated with No. 2 molecular sieve, and the pressure of No. 2 molecular sieve just can increase along with the increase of No. 1 molecular sieve pressure;
4) after No. 1 molecular sieve pressure is stable, open v1204 valve, if No. 2 molecular sieve pressure go up, v1203 valve leak, after judgement, close v1204 valve, No. 1 molecular sieve is also communicated with v1204 valve by v1203 valve with No. 2 molecular sieve, now v1201 valve and v1204 valve are open modes, and No. 1 molecular sieve exists pressure, if the words of leaking appear in v1203 valve, the pressure of No. 2 molecular sieve also will rise, and whether judges the leakage of v1203 valve thus;
5) after v1204 valve closing, open v1206 valve, now remove TIAS1223, TIAS1224, one in TIAS1225 tri-electrical heating points for measuring temperature, and cloth is placed on remove point observe whether swing, if do not swing, then v1205 valve is not revealed, if swing, then v1205 valve leaks, after judgement, close v1206 valve, No. 1 molecular sieve, v1205 valve and TIAS1223, TIAS1224, one in TIAS1225 tri-electrical heating points for measuring temperature forms a path, when there is pressure in No. 1 molecular sieve, if three point for measuring temperature pressure goes up and v1205 valve is in off position, just can illustrate that v1205 valve exists to leak,
6) cloth is placed on purifying silencing end, whether the cloth observing purifying silencing end swings, if do not swing, v1207 valve, v1210 valve is not revealed, if swing, v1207 valve, v1210 valve leaks, v1201 valve, v1207 valve and purifying silencing end form a path, v1201 valve, v1210 valve and purifying silencing end form a path, now v1201 valve open, there is pressure in air compressor machine, and v1207 valve and v1210 valve are closed conditions, cloth swing can illustrate in pipeline to there is pressure, if there is pressure in pipeline to there is leakage situation with regard to one or two in proof v1207 valve and v1210 valve,
7) open the v1202 valve of No. 2 molecular sieve, after No. 2 molecular sieve pressure are stable, open v1203 valve, if No. 1 molecular sieve pressure goes up, v1204 valve leak, after judgement, close v1203 valve, principle is same as described above;
8) after v1203 valve closing, open v1205 valve, now remove in TIAS1223, TIAS1224, TIAS1225 tri-electrical heating points for measuring temperature, and cloth is placed on remove point observe whether swing, if do not swing, then v1206 valve is not revealed, if swing, then v1206 valve leaks, after judgement, close v1205 valve, principle is same as described above;
9) cloth is placed on purifying silencing end, whether the cloth observing purifying silencing end swings, if do not swing, v1208 valve, v1211 valve are not revealed, if swing, v1208 valve, v1211 valve leaks, principle is same as described above.
When leakage has appearred in certain valve of detection, just need to keep in repair this valve or change, because follow-up valve pressurize leak test needs to ensure that pent valve very closes to there is not leakage phenomenon, it is not leaking gas to only have the valve revealed existence to repair or replace rear guarantee, pressurize leak test could be carried out to follow-up valve, ensure the correctness of testing result.
Embodiment two
Present invention also offers a kind of oxygen purifying transfer valve pressurize leak testing process, comprise the following steps:
1) whether, after air separation unit is shut down, air compressor machine does not stop, all valve complete shut-downs, keep air compressor machine pressure to be 0.45mpa, leak PI-1201 and PI-1202 pressure instrumentation observe and decide valve;
2) fractionator pressure is kept to be 0.1-0.2mpa, observe 1, No. 2 molecular sieve pressure whether to go up, time is 20min, if 1, No. 2 molecular sieve pressure do not go up, then v1201 valve, v1202 valve are not revealed, if No. 1 molecular sieve pressure goes up, then and v1201 valve leak, if No. 2 molecular sieve pressure go up, then v1202 valve leak;
3) open the v1201 valve of No. 1 molecular sieve, observe No. 2 molecular sieve pressure and whether go up, if go up, v1209 valve leak;
4) after No. 1 molecular sieve pressure is stable, open v1204 valve, if No. 2 molecular sieve pressure go up, v1203 valve leak, after judgement, closes v1204 valve;
5) after v1204 valve closing, open v1206 valve, now remove in TIAS1223, TIAS1224, TIAS1225 tri-electrical heating points for measuring temperature, tied up by cloth on bamboo pole top, whether cloth is placed on the observation of dismounting point and swings by the hand-held bamboo pole end of workman, if do not swing, then v1205 valve is not revealed, if swing, then v1205 valve leaks, after judgement, close v1206 valve;
6) cloth is tied up on bamboo pole top, cloth is placed on purifying silencing end by the hand-held bamboo pole end of workman, whether the cloth observing purifying silencing end swings, if do not swing, v1207 valve, v1210 valve are not revealed, if swing, and v1207 valve, v1210 valve leaks;
7) open the v1202 valve of No. 2 molecular sieve, after No. 2 molecular sieve pressure are stable, open v1203 valve, if No. 1 molecular sieve pressure goes up, v1204 valve leak, after judgement, closes v1203 valve;
8) after v1203 valve closing, open v1205 valve, now remove in TIAS1223, TIAS1224, TIAS1225 tri-electrical heating points for measuring temperature, tied up by cloth on bamboo pole top, whether cloth is placed on the observation of dismounting point and swings by the hand-held bamboo pole end of workman, if do not swing, then v1206 valve is not revealed, if swing, then v1206 valve leaks, after judgement, close v1205 valve;
9) cloth is tied up on bamboo pole top, cloth is placed on purifying silencing end by the hand-held bamboo pole end of workman, whether the cloth observing purifying silencing end swings, if do not swing, v1208 valve, v1211 valve are not revealed, if swing, and v1208 valve, v1211 valve leaks.
When leakage has appearred in certain valve of detection, just need to keep in repair this valve or change, because follow-up valve pressurize leak test needs to ensure that pent valve very closes to there is not leakage phenomenon, it is not leaking gas to only have the valve revealed existence to repair or replace rear guarantee, pressurize leak test could be carried out to follow-up valve, ensure the correctness of testing result.
Embodiment three
Present invention also offers a kind of oxygen purifying transfer valve pressurize leak testing process, comprise the following steps:
1) whether, after air separation unit is shut down, air compressor machine does not stop, all valve complete shut-downs, keep air compressor machine pressure to be 0.45mpa, leak PI-1201 and PI-1202 pressure instrumentation observe and decide valve;
2) fractionator pressure is kept to be 0.1-0.2mpa, observe 1, No. 2 molecular sieve pressure whether to go up, time is 20min, if 1, No. 2 molecular sieve pressure do not go up, then v1201 valve, v1202 valve are not revealed, if No. 1 molecular sieve pressure goes up, then and v1201 valve leak, if No. 2 molecular sieve pressure go up, then v1202 valve leak;
3) open the v1201 valve of No. 1 molecular sieve, observe No. 2 molecular sieve pressure and whether go up, if go up, v1209 valve leak;
4) after No. 1 molecular sieve pressure is stable, open v1204 valve, if No. 2 molecular sieve pressure go up, v1203 valve leak, after judgement, closes v1204 valve;
5) after v1204 valve closing, open v1206 valve, any one point in TIAS1223, TIAS1224, TIAS1225 tri-electrical heating points for measuring temperature installs PI-1203 pressure instrumentation, for v1205 valve and v1206 valve whether Leak Detection time, replace cloth to observe by PI-1203 pressure instrumentation, if PI-1203 pressure instrumentation does not change, then v1205 valve is not revealed, if the change of PI-1203 pressure instrumentation, then and v1205 valve leaks, after judgement, close v1206 valve;
6) cloth is placed on purifying silencing end, whether the cloth observing purifying silencing end swings, if do not swing, v1207 valve, v1210 valve are not revealed, if swing, and v1207 valve, v1210 valve leaks;
7) open the v1202 valve of No. 2 molecular sieve, after No. 2 molecular sieve pressure are stable, open v1203 valve, if No. 1 molecular sieve pressure goes up, v1204 valve leak, after judgement, closes v1203 valve;
8) after v1203 valve closing, open v1205 valve, any one point in TIAS1223, TIAS1224, TIAS1225 tri-electrical heating points for measuring temperature installs PI-1203 pressure instrumentation, for v1205 valve and v1206 valve whether Leak Detection time, replace cloth to observe by PI-1203 pressure instrumentation, if PI-1203 pressure instrumentation does not change, then v1206 valve is not revealed, if the change of PI-1203 pressure instrumentation, then and v1206 valve leaks, after judgement, close v1205 valve;
9) cloth is placed on purifying silencing end, whether the cloth observing purifying silencing end swings, if do not swing, v1208 valve, v1211 valve are not revealed, if swing, and v1208 valve, v1211 valve leaks.
When leakage has appearred in certain valve of detection, just need to keep in repair this valve or change, because follow-up valve pressurize leak test needs to ensure that pent valve very closes to there is not leakage phenomenon, it is not leaking gas to only have the valve revealed existence to repair or replace rear guarantee, pressurize leak test could be carried out to follow-up valve, ensure the correctness of testing result.
Claims (4)
1. an oxygen purifying transfer valve pressurize leak testing process, is characterized in that: comprise the following steps:
1) whether, after air separation unit is shut down, air compressor machine does not stop, all valve complete shut-downs, keep air compressor machine pressure to be 0.45mpa, leak PI-1201 and PI-1202 pressure instrumentation observe and decide valve;
2) fractionator pressure is kept to be 0.1-0.2mpa, observe 1, No. 2 molecular sieve pressure whether to go up, time is 20min, if 1, No. 2 molecular sieve pressure do not go up, then v1201 valve, v1202 valve are not revealed, if No. 1 molecular sieve pressure goes up, then and v1201 valve leak, if No. 2 molecular sieve pressure go up, then v1202 valve leak;
3) open the v1201 valve of No. 1 molecular sieve, observe No. 2 molecular sieve pressure and whether go up, if go up, v1209 valve leak;
4) after No. 1 molecular sieve pressure is stable, open v1204 valve, if No. 2 molecular sieve pressure go up, v1203 valve leak, after judgement, closes v1204 valve;
5) after v1204 valve closing, open v1206 valve, now remove in TIAS1223, TIAS1224, TIAS1225 tri-electrical heating points for measuring temperature, and cloth is placed on remove point observe whether swing, if do not swing, then v1205 valve is not revealed, if swing, then v1205 valve leaks, after judgement, closes v1206 valve;
6) cloth is placed on purifying silencing end, whether the cloth observing purifying silencing end swings, if do not swing, v1207 valve, v1210 valve are not revealed, if swing, and v1207 valve, v1210 valve leaks;
7) open the v1202 valve of No. 2 molecular sieve, after No. 2 molecular sieve pressure are stable, open v1203 valve, if No. 1 molecular sieve pressure goes up, v1204 valve leak, after judgement, closes v1203 valve;
8) after v1203 valve closing, open v1205 valve, now remove in TIAS1223, TIAS1224, TIAS1225 tri-electrical heating points for measuring temperature, and cloth is placed on remove point observe whether swing, if do not swing, then v1206 valve is not revealed, if swing, then v1206 valve leaks, after judgement, closes v1205 valve;
9) cloth is placed on purifying silencing end, whether the cloth observing purifying silencing end swings, if do not swing, v1208 valve, v1211 valve are not revealed, if swing, and v1208 valve, v1211 valve leaks.
2. oxygen purifying transfer valve pressurize leak testing process as claimed in claim 1, is characterized in that: when using cloth to judge whether leakage, tied up by cloth and detect in bamboo pole front end.
3. oxygen purifying transfer valve pressurize leak testing process as claimed in claim 1, is characterized in that: when detecting certain valve leak, keeping in repair this valve or changing, then carry out next step pressurize leak test work.
4. oxygen purifying transfer valve pressurize leak testing process as claimed in claim 1, it is characterized in that: any one point in TIAS1223, TIAS1224, TIAS1225 tri-electrical heating points for measuring temperature installs PI-1203 pressure instrumentation, for v1205 valve and v1206 valve whether Leak Detection time, replace cloth to observe by PI-1203 pressure instrumentation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410844264.5A CN104502040B (en) | 2014-12-31 | 2014-12-31 | Pressure maintaining and leakage testing method of purification changeover valves for oxygen generation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410844264.5A CN104502040B (en) | 2014-12-31 | 2014-12-31 | Pressure maintaining and leakage testing method of purification changeover valves for oxygen generation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104502040A true CN104502040A (en) | 2015-04-08 |
| CN104502040B CN104502040B (en) | 2017-03-22 |
Family
ID=52943460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410844264.5A Active CN104502040B (en) | 2014-12-31 | 2014-12-31 | Pressure maintaining and leakage testing method of purification changeover valves for oxygen generation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104502040B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106595974A (en) * | 2016-08-22 | 2017-04-26 | 上海二十冶建设有限公司 | Detection method for air tightness of activated carbon flue gas cleaning device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060009991A (en) * | 2004-07-27 | 2006-02-02 | (주)씨엔에스 | Flow swititching valve for oxygen generator |
| CN102967425A (en) * | 2012-12-12 | 2013-03-13 | 天津渤海化工有限责任公司天津碱厂 | Method for testing leakage of oxygen pipeline switching valves before driving |
| CN104061757A (en) * | 2014-07-07 | 2014-09-24 | 开封空分集团有限公司 | Liquid oxygen and liquid nitrogen preparation device and method |
-
2014
- 2014-12-31 CN CN201410844264.5A patent/CN104502040B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060009991A (en) * | 2004-07-27 | 2006-02-02 | (주)씨엔에스 | Flow swititching valve for oxygen generator |
| CN102967425A (en) * | 2012-12-12 | 2013-03-13 | 天津渤海化工有限责任公司天津碱厂 | Method for testing leakage of oxygen pipeline switching valves before driving |
| CN104061757A (en) * | 2014-07-07 | 2014-09-24 | 开封空分集团有限公司 | Liquid oxygen and liquid nitrogen preparation device and method |
Non-Patent Citations (3)
| Title |
|---|
| 冯明义等: "在线处理分子筛纯化系统阀门故障", 《深冷技术》 * |
| 段惠斌: "氢回收分子筛程控阀内漏分析", 《石油化工应用》 * |
| 黄春红等: "分子筛纯化系统均压阀故障分析与在线修理", 《深冷技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106595974A (en) * | 2016-08-22 | 2017-04-26 | 上海二十冶建设有限公司 | Detection method for air tightness of activated carbon flue gas cleaning device |
| CN106595974B (en) * | 2016-08-22 | 2019-01-15 | 上海二十冶建设有限公司 | The air-tightness detection method of active carbon flue gas purification device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104502040B (en) | 2017-03-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| NO150468B (en) | PROCEDURE FOR OPERATING A CYCLICALLY WORKING PRESSURE CHANGE ORDER | |
| CN106348261B (en) | Nitrogen-making device | |
| CN203656574U (en) | Instrument gas supply device | |
| CN113264506B (en) | Hydrogen low-temperature adsorber regeneration process of hydrogen liquefying device | |
| CN104593536B (en) | A kind of method of online replacing air stove blast furnace gas stop valve | |
| CN207648459U (en) | A kind of four bottles of supply cabinets of Full automatic special gas | |
| CN104502040A (en) | Pressure maintaining and leakage testing method of purification changeover valves for oxygen generation | |
| CN103317295A (en) | Oxygen valve online repairing method | |
| CN209286412U (en) | A kind of multiloop oxygen source automatic switching control equipment | |
| CN102380824A (en) | Air source device | |
| CN109876594B (en) | Air adsorption purification system in air separation device | |
| CN104913329A (en) | System using low-temperature methanol washing clean gas as fuel gas | |
| KR101919302B1 (en) | System for detecting malfunction of carbon dioxide selective membrane plant | |
| CN216209029U (en) | Maintenance system of gas unit chemistry online sampling instrument | |
| KR102247315B1 (en) | High pressure carbon dioxide gas purification device | |
| CN115789520A (en) | Liquid source supply device and method and semiconductor process system | |
| CN102589813A (en) | Leakage check method for main heat exchanger leakage of air separation plant | |
| CN210514303U (en) | Intelligent double-insurance carrier-gas-free online monitoring device for dissolved gas in oil | |
| WO2006062237A1 (en) | Fuel cell system and method for inspecting gas leakage of same | |
| NO158330B (en) | PROCEDURE FOR OPERATING A CYCLIC WORKING PRESSURE EXCHANGE ADVERTISING PLANT. | |
| CN211235752U (en) | Quick gas switching device | |
| CN202372320U (en) | Multi-purpose air tightness test bed | |
| JP3547503B2 (en) | Medical compressed air supply device | |
| CN211328778U (en) | Molecular sieve purifier regenerating unit for preventing carbon dioxide from penetrating | |
| CN212663128U (en) | Adsorber system of VPSA oxygenerator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |