CN105854517A - Method for replacing pressure swing adsorption decarburization device before driving by combining nitrogen and evacuation method - Google Patents
Method for replacing pressure swing adsorption decarburization device before driving by combining nitrogen and evacuation method Download PDFInfo
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- CN105854517A CN105854517A CN201610300815.0A CN201610300815A CN105854517A CN 105854517 A CN105854517 A CN 105854517A CN 201610300815 A CN201610300815 A CN 201610300815A CN 105854517 A CN105854517 A CN 105854517A
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- nitrogen
- pressure
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- program control
- gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/047—Pressure swing adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40001—Methods relating to additional, e.g. intermediate, treatment of process gas
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- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Of Gases By Adsorption (AREA)
Abstract
The invention relates to a replacement method before driving after the installation or overhaul of a pressure swing adsorption device, wherein after compressed air purges a pipeline and leakage test and pressure test are qualified, the inside of a tower is full of air, in the first step, an adsorption tower program control valve and a pressure equalizing equipment program control valve are opened, the adsorption tower program control valve and the pressure equalizing equipment program control valve are vacuumized until the pressure is less than or equal to-0.07 MPa, and all the program control valves are closed; and secondly, feeding nitrogen from an outlet main pipe of the adsorption tower to the pressure of 0.005MPa through opening all outlet program control valves through a nitrogen pipeline arranged on an outlet main pipe at the top of the adsorption tower, discharging and replacing the effluent gas from a discharge pipe arranged at a raw material gas inlet, wherein the discharged air amount is 10% -20% of the total capacity of the container, stopping feeding the nitrogen, closing a nitrogen valve, ensuring that the oxygen content in the gas of the raw material gas inlet main pipe reaches-2.5%, the oxygen content of the two steps is repeated to reach-0.2%, the oxygen content of the two steps is repeated again to reach-0.04%, and determining the repetition times according to the required oxygen concentration.
Description
Technical field
The present invention relates to chemical field, be that one effectively utilizes noble gas, the method reducing gas consumption.
Background technology
1, for chemical plant installations more than operating pressure 0.3MPa, general method of replacing is to enter at unstripped gas
Set up nitrogen to replace pipeline at mouth house steward, make access equipment under nitrogen 0.3MPa, be vented after flowing through armamentarium
Method drive the oxygen in air away, this method is practical and is used by almost all of chemical plant.
The method is applied to import and export straight-through equipment and safely and effectively and saves nitrogen.Also have in product gas outlet total
Pipe sets up nitrogen to replace pipeline, makes access equipment under nitrogen 0.3MPa, flows through armamentarium, sets from import department
Standing up the oxygen that the method for vacant duct is driven away in air, the reason of both approaches is identical.
2, for pressure-swing absorption apparatus, said method has the biggest defect to be because pressure-swing absorption apparatus
Pipeline is intricate, does not has simple direct current channel, and pipeline is many with equipment dead angle, has been generally difficult to caecum
The displacement of structure.In order to preferably replace, it is necessary to set up displacement drain on almost all house steward with equipment
Guaranteeing to replace without dead angle, leakage point increases naturally, and management difficulty strengthens, and operation is also inconvenient.For 4
Individual following adsorption tower, owing to pressure-equalizing passageway is few, equipment is few, and directly circulation displacement is also feasible, but
It is for current adsorption tower up to more than 10, even has the device that 40 adsorption towers work simultaneously, displacement
Method uses the big, for 18 towers, 30 cubes of every tower, pressure-equalizing passageway 5 of conventional circulation displacement difficulty exception
The adsorbent equipment of root, nitrogen flow 1000 side of marking/hour, time swap is the most all more than 12 hours.If
It is general all more than 10 that vertically-arranged changes emptying point, and it is more than 10 that displacement sample point is correspondingly arranged.Each point
Sample the displacement of the most qualified guarantee qualified.
3, the nitrogen mark number formulary used by nitrogen displacement be substantially 5 times of container total measurement (volume) or more than, could handle
Device oxygen concentration is reduced to 0.2%.
Summary of the invention
Device is installed or drives after overhaul front method of replacing, present invention be characterized in that, through scavenging conduit
Road is qualified with leak test pressure testing, is all air in tower, the first step, all adsorption towers set up in bottom whole
Evacuation sequencing valve is opened, and opens any one the adsorption tower whole sequencing valves in addition to atmospheric valve, opens adsorption tower
The whole of top export sequencing valve, open the sequencing valve that the most all pressure equipment is connected, thus can ensure that device
Except the armamentarium of vacuum pump outlet, inverse bleeder holes interconnects.
Evacuate whole adsorption tower with all pressure equipment pressure to-0.07MPa and more fine vacuum, stop evacuating, close
All evacuate sequencing valve.This process is reduced to less than 30% the amount of oxygen in equipment, original initial
Oxygen partial pressure is reduced to 0.006MPa and following by 0.021MPa.But the concentration that oxygen is in a device does not has
Reduce, still be about 21%.
Second step, by being arranged on the nitrogen pipeline on adsorption tower top exit house steward from adsorption column outlet house steward
Sending into nitrogen by the whole outlet sequencing valves opened is 0.005MPa to pressure, opens displacement outlet valve, puts
Empty substitution is worked off one's feeling vent one's spleen, and displacement gas emptying amount is the 10%～20% of total place capacity, and this process, oxygen
The concentration of gas is reduced to by original about 21%～2.5%.Stop sending nitrogen, close nitrogen valve, from raw material
Gas intake header analytical sampling mouth samples, and analyzes the oxygen content in gas and reaches～2.5%.
Repeat the first step and second step, sample from raw material gas inlet house steward's analytical sampling mouth, analyze in gas
Oxygen content reaches～0.2%.
The concentration of oxygen determines number of repetition as required, and the most generally less than 0.2% oxygen is qualified.
Required nitrogen total amount is only 2.5 times of whole container capacity, replaces the about circulation of qualified required time and puts
Change the 30% of the time.
Again repeat the first step and second step, sample from raw material gas inlet house steward's analytical sampling mouth, analyze gas
In oxygen content should be～0.04%.
For the device of particular/special requirement, if oxygen requires lower, need to increase evacuation and boosting displacement number of times.
Detailed description of the invention
Embodiment 1:18 tower pressure-changeable adsorption decarbonization device is replaced, through overvoltage before driving after installing or having overhauled
After contracting air purging pipeline (being initially provided with filling adsorbent) is qualified with leak test pressure testing, in tower, it is all air,
The first step, whole evacuation sequencing valves that all adsorption towers are set up in bottom are opened, and open any one absorption
The tower whole sequencing valves in addition to atmospheric valve, open the whole of adsorption tower top and export sequencing valve, open the most all
The sequencing valve that pressure equipment is connected, evacuates whole adsorption tower with all pressure equipment pressure to-0.070MPa, stops evacuating,
Close and all evacuate sequencing valve；Second step, by being arranged on the nitrogen pipeline on adsorption tower top exit house steward
Sending into nitrogen from adsorption column outlet house steward by the whole outlet sequencing valves opened is 0.005MPa to pressure, from
Gas is flowed out in the blow-down pipe emptying displacement that raw material gas inlet is set up, and emptying tolerance is the 20% of container total capacity, stops
Only send nitrogen, close nitrogen valve, sample from raw material gas inlet house steward's analytical sampling mouth, analyze in gas
Oxygen content reaches～2.5%, repeats the first step and second step, samples from raw material gas inlet house steward's analytical sampling mouth,
Analyzing the oxygen content in gas to reach～0.2%, the most generally less than 0.2% oxygen is qualified.
Embodiment 2:21 tower pressure-changeable adsorption decarbonization device is replaced, through overvoltage before driving after installing or having overhauled
After contracting air purging pipeline (being initially provided with filling adsorbent) is qualified with leak test pressure testing, in tower, it is all air,
The first step, whole evacuation sequencing valves that all adsorption towers are set up in bottom are opened, and open any one absorption
The tower whole sequencing valves in addition to atmospheric valve, open the whole of adsorption tower top and export sequencing valve, open the most all
The sequencing valve that pressure equipment is connected, evacuates whole adsorption tower with all pressure equipment pressure to-0.075MPa, stops evacuating,
Close and all evacuate sequencing valve；Second step, by being arranged on the nitrogen pipeline on adsorption tower top exit house steward
Sending into nitrogen from adsorption column outlet house steward by the whole outlet sequencing valves opened is 0.005MPa to pressure, from
Gas is flowed out in the blow-down pipe emptying displacement that raw material gas inlet is set up, and emptying tolerance is the 15% of container total capacity, stops
Only send nitrogen, close nitrogen valve, sample from raw material gas inlet house steward's analytical sampling mouth, analyze in gas
Oxygen content reaches～2.5%, repeats the first step and second step, samples from raw material gas inlet house steward's analytical sampling mouth,
Analyzing the oxygen content in gas to reach～0.2%, the most generally less than 0.2% oxygen is qualified.
Embodiment 3:16 tower pressure-changeable adsorption decarbonization device is replaced, through overcompression before driving after installing or having overhauled
After air purging pipeline (being initially provided with filling adsorbent) is qualified with leak test pressure testing, in tower, it is all air, the
One step, whole evacuation sequencing valves that all adsorption towers are set up in bottom are opened, and open any one adsorption tower and remove
Whole sequencing valves outside atmospheric valve, open the whole of adsorption tower top and export sequencing valve, open and all press equipment
The sequencing valve being connected, evacuates whole adsorption tower with all pressure equipment pressure to-0.08MPa, stops evacuating, cut out complete
Portion evacuates sequencing valve；Second step, by being arranged on the nitrogen pipeline on adsorption tower top exit house steward from adsorption tower
It is 0.005MPa to pressure that outlet header sends into nitrogen by the whole outlet sequencing valves opened, from raw material gas inlet
Gas is flowed out in the blow-down pipe emptying displacement set up, and emptying tolerance is the 11% of container total capacity, stops sending nitrogen, closes
Closing nitrogen valve, sample from raw material gas inlet house steward's analytical sampling mouth, the oxygen content analyzed in gas reaches
～2.5%, repeat the first step and second step, sample from raw material gas inlet house steward's analytical sampling mouth, analyze in gas
Oxygen content reaches～0.2%, and the most generally less than 0.2% oxygen is qualified.
Claims (1)
1. method of replacing before driving after pressure-swing absorption apparatus is installed or overhauled, it is characterised in that
After compressed air purging pipeline (being initially provided with filling adsorbent) is qualified with leak test pressure testing,
Air it is all in tower, the first step, whole evacuate sequencing valve what all adsorption towers were set up in bottom
Open, open any one the adsorption tower whole sequencing valves in addition to atmospheric valve, open absorption tower top
The whole of portion export sequencing valve, open the sequencing valve that the most all pressure equipment is connected, evacuate and all inhale
Attached tower and all pressure equipment pressure, to-0.07MPa or more condition of high vacuum degree, stop evacuating, and close complete
Portion evacuates sequencing valve；Second step, by being arranged on the nitrogen tube on adsorption tower top exit house steward
Road sends into nitrogen from adsorption column outlet house steward by the whole outlet sequencing valves opened
0.005MPa, the blow-down pipe emptying displacement set up from raw material gas inlet is flowed out gas, is vented tolerance
For the 10%～20% of container total capacity, stop sending nitrogen, close nitrogen valve, from unstripped gas
Intake header analytical sampling mouth samples, and analyzes the oxygen content in gas and reaches～2.5%, repeats
The first step and second step, sample from raw material gas inlet house steward's analytical sampling mouth, analyzes in gas
Oxygen content reaches～0.2%, again repeats the first step and second step, from raw material gas inlet house steward
Analytical sampling mouth samples, and analyzes the oxygen content in gas and reaches～0.04%, oxygen as required
The concentration of gas determines number of repetition, and the most generally less than 0.2% oxygen is qualified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610300815.0A CN105854517B (en) | 2016-05-10 | 2016-05-10 | Method for replacing pressure swing adsorption decarburization device before driving by combining nitrogen and evacuation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610300815.0A CN105854517B (en) | 2016-05-10 | 2016-05-10 | Method for replacing pressure swing adsorption decarburization device before driving by combining nitrogen and evacuation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105854517A true CN105854517A (en) | 2016-08-17 |
| CN105854517B CN105854517B (en) | 2018-12-28 |
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| CN201610300815.0A Active CN105854517B (en) | 2016-05-10 | 2016-05-10 | Method for replacing pressure swing adsorption decarburization device before driving by combining nitrogen and evacuation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949373A (en) * | 2017-03-23 | 2017-07-14 | 中车西安车辆有限公司 | A kind of pressure vessel nitrogen displacement method and device |
| CN112717630A (en) * | 2020-12-31 | 2021-04-30 | 天脊煤化工集团股份有限公司 | Method for replacing adsorbent of adsorption tower on line |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101549240A (en) * | 2009-04-23 | 2009-10-07 | 天津大学 | Method containing carbon dioxide replacement for absorbing methane in condensed coal bed gas through pressure varying mode |
| CN102556974A (en) * | 2010-12-27 | 2012-07-11 | 湖北中科博策新材料研究院 | Method for continuously preparing iodine pentafluoride |
-
2016
- 2016-05-10 CN CN201610300815.0A patent/CN105854517B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101549240A (en) * | 2009-04-23 | 2009-10-07 | 天津大学 | Method containing carbon dioxide replacement for absorbing methane in condensed coal bed gas through pressure varying mode |
| CN102556974A (en) * | 2010-12-27 | 2012-07-11 | 湖北中科博策新材料研究院 | Method for continuously preparing iodine pentafluoride |
Non-Patent Citations (1)
| Title |
|---|
| 刘朋立: ""PSA变压吸附程控阀故障的处理"", 《煤炭化工》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949373A (en) * | 2017-03-23 | 2017-07-14 | 中车西安车辆有限公司 | A kind of pressure vessel nitrogen displacement method and device |
| CN112717630A (en) * | 2020-12-31 | 2021-04-30 | 天脊煤化工集团股份有限公司 | Method for replacing adsorbent of adsorption tower on line |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105854517B (en) | 2018-12-28 |
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Address after: 610072 No. 301, Unit 4, Building 13, No. 118, Jinze Road, Qingyang District, Chengdu City, Sichuan Province Applicant after: Yang Hao Address before: 610031 No. 3724 Wantong Financial Plaza, 88 Jinfu Road, Jinniu District, Chengdu City, Sichuan Province Applicant before: Yang Hao |
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Effective date of registration: 20220510 Address after: 610041 No. 801, 8th Floor, No. 88 South Keyuan Road, Chengdu High-tech Zone, Sichuan Province Patentee after: SICHUAN TIANREN ENERGY TECHNOLOGY Co.,Ltd. Address before: 610072 No. 301, Unit 4, Building 13, No. 118, Jinze Road, Qingyang District, Chengdu City, Sichuan Province Patentee before: Yang Hao |
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