CN110203989A - A kind of high-purity water preparation apparatus of deoxidation and technique - Google Patents
A kind of high-purity water preparation apparatus of deoxidation and technique Download PDFInfo
- Publication number
- CN110203989A CN110203989A CN201811049167.1A CN201811049167A CN110203989A CN 110203989 A CN110203989 A CN 110203989A CN 201811049167 A CN201811049167 A CN 201811049167A CN 110203989 A CN110203989 A CN 110203989A
- Authority
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- Prior art keywords
- deoxidation
- pipeline
- deoxidation tower
- liquid
- tower
- 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.)
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- 239000012498 ultrapure water Substances 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 73
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 58
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 36
- 230000001105 regulatory effect Effects 0.000 claims abstract description 20
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 18
- 238000007599 discharging Methods 0.000 claims abstract description 16
- 238000009826 distribution Methods 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 12
- 238000010992 reflux Methods 0.000 claims abstract description 12
- 238000011049 filling Methods 0.000 claims abstract description 11
- 238000011068 loading method Methods 0.000 claims abstract description 11
- 239000007921 spray Substances 0.000 claims description 9
- 238000003860 storage Methods 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 239000000428 dust Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000012824 chemical production Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
- C02F2103/04—Non-contaminated water, e.g. for industrial water supply for obtaining ultra-pure water
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/42—Liquid level
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/046—Recirculation with an external loop
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention belongs to chemical industry technical fields, and in particular to a kind of high-purity water preparation apparatus of deoxidation and technique, it is characterised in that: include at least a deoxidation tower, the deoxidation tower top is equipped with desalted water feeding line and blow-down pipe；Middle part is equipped with the low-pressure nitrogen feeding line with spinner flowmeter；Lower part is equipped with pipeline and connects water pump, and is equipped with long-distance liquid-level meter and live magnetic double level gauge.The deoxidation tower top is narrow, arranges one layer of Bauer ring bulk loading filling material；Lower part is more roomy, can store liquid level and play the role of surge tank.The desalted water feeding line is equipped with regulating valve, and end, which is placed in deoxidation tower top, is equipped with injecting type liquid distribution trough.The pump entrance is equipped with basket filter, and outlet is equipped with minimum reflux pipeline and returns to deoxidation tower, is equipped with discharging pipeline connection deoxidation high purity water and uses unit.Liquid level automatic adjustment, quick, convenient preparation deoxidation high purity water may be implemented in the set technique.
Description
Technical field
The invention belongs to chemical industry technical fields, and in particular to a kind of high-purity water preparation apparatus of deoxidation and technique.
Background technique
In chemical production technology, deoxidation high purity water has a wide range of applications.Because it is not oxygen-containing, pipeline oxidization will not be made rotten
Erosion, will not influence the activity of catalyst, be frequently utilized for slurried catalyst dilution preparation or participate in directly as reactant
Reaction.Therefore a kind of safe, simple, efficient deoxidation high purity water preparation process is designed at a urgent task, to chemical industry
Technique seems significant.
Summary of the invention
To overcome existing technology vacancy, the purpose of the present invention is to provide a kind of high-purity water preparation apparatus of deoxidation and works
Skill realizes quick, the simple preparation of deoxidation high purity water.
To achieve the goals above, the technical solution adopted by the present invention are as follows: a kind of high-purity water preparation apparatus of deoxidation, feature
It is: includes at least a deoxidation tower, the deoxidation tower top is equipped with desalted water feeding line and blow-down pipe；Middle part is by turning
Subflow meter and pipe fitting valve are connect with low-pressure nitrogen feeding line；Lower part has pipeline to connect water pump；Deoxidation tower lower end two sides have
Long-distance liquid-level meter and live magnetic double level gauge；Blow-down pipe is connected to the top of deoxidation tower by pipeline；Desalted water feed pipe
Line is connected by the end of regulating valve and the overhead line of deoxidation tower；The pump entrance passes through the bottom of pipeline valve and deoxidation tower
The connection of portion's pipeline；The exit of pump is equipped with discharging pipeline connection deoxidation high purity water and uses unit；The desalted water feeding line
There is level chain between regulating valve and long-distance liquid-level meter, liquid level can be automatically adjusted, realizes liquid level automatic adjustment, quick, convenient system
Standby deoxidation high purity water.
The deoxidation tower top is narrow, arranges one layer of Bauer ring bulk loading filling material；Lower part is wide, and lower part storage liquid plays surge tank
Effect.
Injecting type liquid distribution trough is equipped in the deoxidation tower top.
The exit of pump is equipped with minimum reflux pipeline and returns to deoxidation tower.
The pump entrance is equipped with basket filter.
The injecting type liquid distribution trough is made of 6 spray heads and series connection cross pipe support, and 6 spray heads are distributed in series connection cross tee
On frame.
A kind of deoxidation high purity water preparation process: it is characterized by: including at least a deoxidation tower, the deoxidation tower top is set
There are desalted water feeding line and blow-down pipe；Middle part is connected by spinner flowmeter and pipe fitting valve and low-pressure nitrogen feeding line
It connects；Lower part has pipeline to connect water pump；There are long-distance liquid-level meter and live magnetic double level gauge in deoxidation tower lower end two sides；Blow-down pipe is logical
Cross the top that pipeline is connected to deoxidation tower；Desalted water feeding line is connected by the end of regulating valve and the overhead line of deoxidation tower
It connects；The pump entrance is connected by the bottom line of pipeline valve and deoxidation tower；The exit of pump is equipped with discharging pipeline and connects
It connects deoxidation high purity water and uses unit；There is level chain between the desalted water feeding line regulating valve and long-distance liquid-level meter；It is described
Deoxidation tower top is narrow, arranges one layer of Bauer ring bulk loading filling material；Lower part is wide, and lower part storage liquid plays the role of surge tank；It is described
Injecting type liquid distribution trough is equipped in deoxidation tower top；The exit of pump is equipped with minimum reflux pipeline and returns to deoxidation tower；It is described
Pump entrance is equipped with basket filter；Desalted water enters on deoxidation tower after desalted water feeding line controls flow by regulating valve
Portion flows downward after injecting type liquid distribution trough even spraying；Low-pressure nitrogen is through low-pressure nitrogen pipeline by spinner flowmeter control
Enter in the middle part of deoxidation tower after flow processed, flows up, gas-liquid two-phase comes into full contact in Bauer ring bulk loading filling material, and nitrogen takes oxygen out of
Gas is vented through blow-down pipe；The desalted water of deoxidation retains certain liquid level in deoxidation tower lower part and filters out dust etc. through basket filter
Impurity uses unit through what discharging pipeline feeding needed by water pump；Minimum reflux pipeline is walked in discharging when initial driving, to deoxygenation
After lattice, switching discharging.
The long-distance liquid-level meter and regulating valve hangs level chain, automatically adjusts liquid level.
The live magnetic double level gauge can be used for observing liquid level when initial liquid level check and correction or long-distance liquid-level meter failure.
The invention has the advantages that the present invention is equipped with desalted water feeding line and blow-down pipe on deoxidation tower top；Middle part is set
There is the low-pressure nitrogen feeding line with spinner flowmeter；Lower part is equipped with pipeline and connects water pump, and is equipped with long-distance liquid-level meter and scene
Magnetic double level gauge.The deoxidation tower top is narrow, arranges one layer of Bauer ring bulk loading filling material；Lower part is more roomy, can store liquid level
Play the role of surge tank；Desalted water feeding line is equipped with regulating valve, and end, which is placed in deoxidation tower top, is equipped with jetting type liquid
Body distributor is equipped with basket filter in pump entrance, and outlet is equipped with minimum reflux pipeline and returns to deoxidation tower, discharging pipeline connection
Deoxidation high purity water uses unit, and desalted water feeding line regulating valve and long-distance liquid-level meter are equipped with level chain, realizes automatic adjust
Save liquid level.
The present invention, which has, realizes liquid level automatic adjustment, quick, convenient preparation deoxidation high purity water.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the high-purity water preparation apparatus technique of deoxidation.
Fig. 2 is the structural map of injecting type liquid distribution trough 5.
Figure label: 1, desalted water feeding line；2, regulating valve；3, blow-down pipe；4, injecting type liquid distribution trough amplifies
Figure；4-1,6 spray heads；4-2, series connection cross pipe support；5, injecting type liquid distribution trough；6, Bauer ring bulk loading filling material；7, spinner
Meter；8, level chain；9, long-distance liquid-level meter；10, deoxidation tower；11, minimum reflux pipeline；12, live magnetic double level gauge；13,
Low-pressure nitrogen feeding line；14, basket filter；15, water pump；16, discharge pipeline；17, deoxidation high purity water uses unit.
Specific embodiment
Technical solution of the present invention is further described now in conjunction with drawings and examples, but the present invention is not limited only to
Following implementation situations.
As shown in Figure 1, the high-purity water preparation apparatus of a kind of deoxidation, it is characterised in that: a deoxidation tower 10 is included at least, it is described
10 top of deoxidation tower is equipped with desalted water feeding line 1 and blow-down pipe 3；Middle part by spinner flowmeter 7 and pipe fitting valve with it is low
Nitrogen feed pipeline 13 is pressed to connect；Lower part has pipeline to connect water pump 15；There are long-distance liquid-level meter 9 and scene in 10 lower end two sides of deoxidation tower
Magnetic double level gauge 12；Blow-down pipe 3 is connected to the top of deoxidation tower 10 by pipeline；Desalted water feeding line 1 passes through adjusting
The end of valve 2 is connect with the overhead line of deoxidation tower 10；15 entrance of water pump passes through the bottom of pipeline valve and deoxidation tower 10
Pipeline connection；The outlet of water pump 15 is equipped with the discharging connection deoxidation high purity water of pipeline 16 and uses unit 17；The desalted water charging
There is level chain 8 between pipeline regulating valve 2 and long-distance liquid-level meter 9, liquid level can be automatically adjusted, realizes liquid level automatic adjustment, quickly,
Convenient preparation deoxidation high purity water.
10 top of deoxidation tower is narrow, arranges one layer of Bauer ring bulk loading filling material 6；Lower part is wide, and lower part storage liquid plays slow
Rush the effect of tank.
Injecting type liquid distribution trough 5 is equipped in 10 top of deoxidation tower.
The outlet of water pump 15 is equipped with minimum reflux pipeline 11 and returns to deoxidation tower 10.
15 entrance of water pump is equipped with basket filter 14.
As shown in Fig. 2, the injecting type liquid distribution trough 5 is made of 6 spray head 4-1 and series connection cross pipe support 4-2,6 sprays
Head 4-1 is distributed on series connection cross pipe support 4-2.
As shown in Figure 1, a kind of deoxidation high purity water preparation process: it is characterized by: a deoxidation tower 10 is included at least, it is described
10 top of deoxidation tower is equipped with desalted water feeding line 1 and blow-down pipe 3；Middle part by spinner flowmeter 7 and pipe fitting valve with it is low
Nitrogen feed pipeline 13 is pressed to connect；Lower part has pipeline to connect water pump 15；There are long-distance liquid-level meter 9 and scene in 10 lower end two sides of deoxidation tower
Magnetic double level gauge 12；Blow-down pipe 3 is connected to the top of deoxidation tower 10 by pipeline；Desalted water feeding line 1 passes through adjusting
The end of valve 2 is connect with the overhead line of deoxidation tower 10；15 entrance of water pump passes through the bottom of pipeline valve and deoxidation tower 10
Pipeline connection；The outlet of water pump 15 is equipped with the discharging connection deoxidation high purity water of pipeline 16 and uses unit 17；The desalted water charging
There is level chain 8 between pipeline regulating valve 2 and long-distance liquid-level meter 9；10 top of deoxidation tower is narrow, arranges that one layer of Pall ring is in bulk
Filler 6；Lower part is wide, and lower part storage liquid plays the role of surge tank；Injecting type liquid point is equipped in 10 top of deoxidation tower
Cloth device 5；The outlet of water pump 15 is equipped with minimum reflux pipeline 11 and returns to deoxidation tower 10；15 entrance of water pump is equipped with basket filtering
Device 14；Desalted water enters 10 top of deoxidation tower after desalted water feeding line 1 controls flow by regulating valve 2, through injecting type liquid
It flows downward after 5 even spraying of distributor；Low-pressure nitrogen enters after low-pressure nitrogen pipeline 13 controls flow by spinner flowmeter 7
10 middle part of deoxidation tower, flows up, gas-liquid two-phase comes into full contact in Bauer ring bulk loading filling material 6, and nitrogen takes oxygen out of through being vented
Pipeline 3 is vented；The desalted water of deoxidation in 10 lower part of deoxidation tower retains certain liquid level, and through basket filter 14 to filter out dust etc. miscellaneous
Matter uses unit 17 through what the discharging feeding of pipeline 16 needed by water pump 15；Minimum reflux pipeline 11 is walked in discharging when initial driving, to
After deoxidation is qualified, switching discharging.
Long-distance liquid-level meter 9 and regulating valve 2 hang level chain 8, automatically adjust liquid level.
Live magnetic double level gauge 12 can be used for observing liquid level when initial liquid level check and correction or long-distance liquid-level meter failure.
As shown in Fig. 2, the injecting type liquid distribution trough 5 is made of 6 spray head 4-1 and series connection cross pipe support 4-2,6 sprays
Head 4-1 is distributed on series connection cross pipe support 4-2.
The well-known components and common structure of component and the structure category industry that the present embodiment does not describe in detail or common hand
Section, does not describe one by one here.
Claims (9)
1. a kind of high-purity water preparation apparatus of deoxidation, it is characterised in that: include at least a deoxidation tower (10), the deoxidation tower (10)
Top is equipped with desalted water feeding line (1) and blow-down pipe (3)；Middle part passes through spinner flowmeter (7) and pipe fitting valve and low pressure
Nitrogen feed pipeline (13) connection；Lower part has pipeline to connect water pump (15)；Deoxidation tower (10) lower end two sides have long-distance liquid-level meter (9)
With live magnetic double level gauge (12)；Blow-down pipe (3) is connected to the top of deoxidation tower (10) by pipeline；Desalted water feed pipe
Line (1) is connect by the end of regulating valve (2) with the overhead line of deoxidation tower (10)；Water pump (15) entrance passes through line valve
Door is connect with the bottom line of deoxidation tower (10)；Water pump (15) outlet, which is equipped with discharging pipeline (16) connection deoxidation high purity water, to be made
With unit (17)；There are level chain (8) between desalted water feeding line (1) regulating valve (2) and long-distance liquid-level meter (9), it can
Liquid level is automatically adjusted, realizes liquid level automatic adjustment, quick, convenient preparation deoxidation high purity water.
2. the high-purity water preparation apparatus of a kind of deoxidation according to claim 1, it is characterised in that: deoxidation tower (10) top
It is narrow, arrange one layer of Bauer ring bulk loading filling material (6)；Lower part is wide, and lower part storage liquid plays the role of surge tank.
3. the high-purity water preparation apparatus of a kind of deoxidation according to claim 1, it is characterised in that: deoxidation tower (10) top
It is interior to be equipped with injecting type liquid distribution trough (5).
4. the high-purity water preparation apparatus of a kind of deoxidation according to claim 1, it is characterised in that: water pump (15) outlet is set
There are minimum reflux pipeline (11) to return to deoxidation tower (10).
5. the high-purity water preparation apparatus of a kind of deoxidation according to claim 1, it is characterised in that: water pump (15) entrance is set
There are basket filter (14).
6. the high-purity water preparation apparatus of a kind of deoxidation according to claim 3, it is characterised in that: the injecting type liquid distribution
Device (5) is made of 6 spray heads (4-1) and series connection cross pipe support (4-2), and 6 spray heads (4-1) are distributed in series connection cross pipe support (4-2)
On.
7. a kind of deoxidation high purity water preparation process: it is characterized by: including at least a deoxidation tower, the deoxidation tower top is equipped with
Desalted water feeding line and blow-down pipe；Middle part is connect by spinner flowmeter and pipe fitting valve with low-pressure nitrogen feeding line；
Lower part has pipeline to connect water pump；There are long-distance liquid-level meter and live magnetic double level gauge in deoxidation tower lower end two sides；Blow-down pipe passes through
Pipeline is connected to the top of deoxidation tower；Desalted water feeding line is connected by the end of regulating valve and the overhead line of deoxidation tower；
The pump entrance is connected by the bottom line of pipeline valve and deoxidation tower；It is de- that the exit of pump is equipped with discharging pipeline connection
Oxygen high purity water uses unit；There is level chain between the desalted water feeding line regulating valve and long-distance liquid-level meter；The deoxidation
Tower top is narrow, arranges one layer of Bauer ring bulk loading filling material；Lower part is wide, and lower part storage liquid plays the role of surge tank；The deoxidation
Injecting type liquid distribution trough is equipped in tower top；The exit of pump is equipped with minimum reflux pipeline and returns to deoxidation tower；The water pump
Entrance is equipped with basket filter；Desalted water enters deoxidation tower top, warp after desalted water feeding line controls flow by regulating valve
It flows downward after injecting type liquid distribution trough even spraying；Low-pressure nitrogen controls flow by spinner flowmeter through low-pressure nitrogen pipeline
Enter in the middle part of deoxidation tower afterwards, flows up, gas-liquid two-phase comes into full contact in Bauer ring bulk loading filling material, and nitrogen takes oxygen out of through putting
Empty exhausting pipeline；The desalted water of deoxidation deoxidation tower lower part retain certain liquid level through basket filter filter out the impurity such as dust by
Water pump uses unit through what discharging pipeline feeding needed；Minimum reflux pipeline is walked in discharging when initial driving, after deoxidation is qualified, is cut
Swap out material.
8. a kind of deoxidation high purity water preparation process according to claim 7, it is characterised in that: the long-distance liquid-level meter with
Regulating valve hangs level chain, automatically adjusts liquid level.
9. a kind of deoxidation high purity water preparation process according to claim 7, it is characterised in that: the live magnetic turning plate liquid
Position meter can be used for observing liquid level when initial liquid level check and correction or long-distance liquid-level meter failure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811049167.1A CN110203989A (en) | 2018-09-10 | 2018-09-10 | A kind of high-purity water preparation apparatus of deoxidation and technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811049167.1A CN110203989A (en) | 2018-09-10 | 2018-09-10 | A kind of high-purity water preparation apparatus of deoxidation and technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110203989A true CN110203989A (en) | 2019-09-06 |
Family
ID=67779832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811049167.1A Pending CN110203989A (en) | 2018-09-10 | 2018-09-10 | A kind of high-purity water preparation apparatus of deoxidation and technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110203989A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113277587A (en) * | 2021-05-31 | 2021-08-20 | 聊城鲁西聚酰胺新材料科技有限公司 | Desalted water deoxygenation device and process for producing nylon 6 |
| CN113772772A (en) * | 2021-08-31 | 2021-12-10 | 国网冀北电力有限公司电力科学研究院 | Dissolved oxygen removal device, internal cooling water system of converter valve and dissolved oxygen removal method thereof |
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| Title |
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| 王刚军;牛文颖;: "油气田注水中几种脱氧工艺技术比较" * |
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| CN113277587A (en) * | 2021-05-31 | 2021-08-20 | 聊城鲁西聚酰胺新材料科技有限公司 | Desalted water deoxygenation device and process for producing nylon 6 |
| CN113772772A (en) * | 2021-08-31 | 2021-12-10 | 国网冀北电力有限公司电力科学研究院 | Dissolved oxygen removal device, internal cooling water system of converter valve and dissolved oxygen removal method thereof |
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Application publication date: 20190906 |