CN101733261A - Cleaning method for inner tube scab dissolved by fused salt heat exchanging segment - Google Patents
Cleaning method for inner tube scab dissolved by fused salt heat exchanging segment Download PDFInfo
- Publication number
- CN101733261A CN101733261A CN200910242196A CN200910242196A CN101733261A CN 101733261 A CN101733261 A CN 101733261A CN 200910242196 A CN200910242196 A CN 200910242196A CN 200910242196 A CN200910242196 A CN 200910242196A CN 101733261 A CN101733261 A CN 101733261A
- Authority
- CN
- China
- Prior art keywords
- scab
- fused salt
- heat exchanging
- exchanging segment
- salt heat
- 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.)
- Pending
Links
- 150000003839 salts Chemical class 0.000 title claims abstract description 53
- 206010039509 Scab Diseases 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000004140 cleaning Methods 0.000 title claims abstract description 25
- 230000008569 process Effects 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 230000003993 interaction Effects 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 abstract description 2
- 239000012528 membrane Substances 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000012452 mother liquor Substances 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 238000004131 Bayer process Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 235000012215 calcium aluminium silicate Nutrition 0.000 description 1
- 239000000404 calcium aluminium silicate Substances 0.000 description 1
- WNCYAPRTYDMSFP-UHFFFAOYSA-N calcium aluminosilicate Chemical compound [Al+3].[Al+3].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O WNCYAPRTYDMSFP-UHFFFAOYSA-N 0.000 description 1
- 229940078583 calcium aluminosilicate Drugs 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000010413 mother solution Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- -1 salt salt Chemical class 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Cleaning In General (AREA)
Abstract
The invention relates to a cleaning method for inner tube scab dissolved by a fused salt heat exchanging segment. The method is characterized by comprising the following cleaning processes: clearly discharging inner tube material dissolved by the fused salt heat exchanging segment, continuously heating the fused salt heat exchanging segment, and damaging scab by interactional stress of tube and scab according to different heated expansion coefficients of the two to remove scab by self stripping of scab. The method of the invention effectively reduces the temperature of the outlet of a fused salt furnace of a device, prolongs cleaning period, lowers maintenance cost, effectively reduces system differential pressure, reduces high-pressure operation time of the device in the cleaning period, and is easy to implement, promote and apply industrially.
Description
Technical field
The present invention relates to a kind of cleaning method for inner tube scab dissolved by fused salt heat exchanging segment.
Background technology
The channelization stripping is a kind of energy-efficient Bayer process dissolving device (carrying out the description of common-sense).Weak point service cycle of channelization device directly affects the output of alumina producing.The fused salt heat exchanging segment of channelization stripping can be along with the prolongation of running time, in stripping, constantly adhere to sodium white residue etc. on the pipe and scab, and then influence system's heat exchange efficiency, so need regularly clear up fused salt heat exchanging segment, present existing method for cleaning, the defective of existence etc.Though by constantly attacking, improve the quality of cleaning maintenance, the cycle of operation increases, effect is undesirable, can't satisfy the needs of alumina producing, becomes the restriction point that output improves.Particularly the grade at raw ore descends, and A/S continues to reduce, and the output task is heavy, and a channelization high position contains under the situation of continuous rise admittedly, and the cycle of operation of device is shorter.Though take as strict flash-pot control in the monitoring of increasing cleaning process, the operation, make full use of the whole bag of tricks such as exhaust steam, raising heat exchange effect, effect is also not obvious.
Summary of the invention
Purpose of the present invention is exactly the deficiency that exists at above-mentioned prior art, provides a kind of and can effectively cut down the consumption of energy and the extension fixture cycle of operation, is easy at industrial enforcement and the cleaning method for inner tube scab dissolved by fused salt heat exchanging segment applied.
The objective of the invention is to be achieved through the following technical solutions.
A kind of cleaning method for inner tube scab dissolved by fused salt heat exchanging segment, it is characterized in that its scale removal process is to drain pipe material in the fused salt heat exchanging segment stripping clean, to continuing fused salt heat exchanging segment is heated then, utilize pipeline different, scab with two-way interaction's stress rupture and peel off automatically and remove with the expanded by heating coefficient that scabs.
A kind of cleaning method for inner tube scab dissolved by fused salt heat exchanging segment of the present invention is characterized in that it drains clean process with Guan Shui in the fused salt heat exchanging segment stripping is with changeing water after 1.5 hours, drains interior pipe material clean.
A kind of cleaning method for inner tube scab dissolved by fused salt heat exchanging segment of the present invention is characterized in that its its scale removal process is 335 ℃ to the temperature of molten salt that continues fused salt heat exchanging segment is heated.
Method of the present invention, scale removal process control fused salt salt temperature is in certain temperature province, after changeing water 1.5h, water drains only in the handle assembly, then the SWT section is carried out blank pipe heating, utilize pipeline (16Mn steel) different, scab with two-way interaction's stress rupture with the expanded by heating coefficient of scab (sodium white residue, calcium aluminosilicate hydrate etc.), clear up with this and to scab, thereby reach the purpose that reduces the molten salt furnace outlet temperature.
Method of the present invention has reduced the molten salt furnace outlet salt temperature of device effectively, has prolonged the cleaning frequency, has reduced the cost of overhaul, effectively reduces system's pressure reduction, reduces the device high-voltage operation time in the cleaning frequency, is easy in industrial enforcement and applies.
The specific embodiment
A kind of cleaning method for inner tube scab dissolved by fused salt heat exchanging segment, its scale removal process is to drain pipe material in the fused salt heat exchanging segment stripping clean, to continuing fused salt heat exchanging segment is heated then, utilize pipeline different, scab with two-way interaction's stress rupture and peel off automatically and remove with the expanded by heating coefficient that scabs.
The concrete operations implementation step can be
1. early-stage preparations
1.1 stop according to repair schedule, stop ore pulp pump, mother liquor pump and notify pre-desiliconization post, stop to the head tank transfer ore pulp.
1.2 the unlatching booster pump, device changes water.Notice molten salt furnace post reduces stove load, when returning the salt temperature when reaching 300 ℃, blowing out, stops salt pump.
1.3 after device changeed water, east row's incoagulable gas valve was opened in notice pylon post, changes water after 1.5 hours, Lindenmayer system, remaining tank air bleeding valve, K system baiting valve are opened in notice pylon post.Close the discharging flow process, contain alkali content at E8 screen box place chemical examination K7 water, when less than 1.0g/L, notice control room K7 water effluxes.
1.4 stop membrane pump when changeing water for cooling to 90 ℃ of 1# remaining tanks, to close and change the current journey, the barrier film pump house begins to discharge water, dismounting SWT4 outlet bend pipe.
1.5 send all electric tracings except that salt cellar.
2. transfer from one department to another the wind draining of uniting
Bend pipe is closed the membrane pump baiting valve after removing, and the wind of uniting is transfered from one department to another in notice membrane pump post, and will install hydraulic pressure from the SWT4 exit and go out, after setting-out finishes, the closes compression air.Recover SWT4 outlet bend pipe, arrange to handle membrane pump and other device problems, improvement current journey is prepared in the notice post.
3.SWT section blank pipe heating
3.1SWT when section electric tracing temperature reaches 180 ℃, open salt pump, the some stove starts the fused salt circulation, stops salt pipeline and salt valve electric tracing.
3.2 slowly promote temperature of molten salt, make that the molten salt furnace outlet temperature reaches about 340 ℃ after, stable furnace outlet temperature is played circulation, when the salt cellar temperature be higher than 335 ℃ stop the circulation.
4. device changes water, changes mother liquor
Change water 4.1 start membrane pump, discharge capacity 200m3/h changes water and installs the commentaries on classics Recycling Mother Solution after 15 minutes, stove oepration at full load, normal temperature raising.
4.2 the notice pylon cuts out Lindenmayer system, remaining tank, and BWT section row incoagulable gas valve, flow process is changeed back mother liquor tank.K system baiting valve is looked K system liquid level and is just determined whether close,
5. commentaries on classics ore pulp
After unit temp reaches, change ore pulp, the dry combustion method water-washing process is all over.
Embodiment
1, on March 7th, 2008, two channelization molten salt furnace outlet temperatures are reduced to 366 ℃ by 375 ℃, descend 9 ℃.2, on March 27th, 2008, a channelization molten salt furnace outlet temperature is reduced to 355 ℃ by 375 ℃, descends 20 ℃.3, on May 8th, 2008, two channelization molten salt furnace outlet temperatures are reduced to 342 ℃ by 378 ℃, descend 36 ℃.4, on May 31st, 2008, two channelization molten salt furnace outlet temperatures are reduced to 346 ℃ by 369 ℃, descend 23 ℃.By seeing utilizing inner tube scab dissolved Removal Technology to carry out cool effect four times between March to May, this inner tube scab dissolved Removal Technology is used the back: 1, effective reduction reduced the molten salt furnace outlet salt temperature of device.2, the cleaning frequency extended to by original average about 45 days and is no less than 80 days.3, make molten salt furnace heavy-duty service time shortening in each cleaning frequency, install average daily energy consumption and descend.4, prolonged the cycle of cleaning frequency, annual maintenance number of times will be reduced the corresponding reduction of the cost of overhaul.5, effectively reduce system's pressure reduction, reduce the device high-voltage operation time in the cleaning frequency.Plant and to overcome the deficiency that above-mentioned existing method can't overcome, characteristic at canalization dissolving out apparatus, in the cycle of operation, with of the cleaning of short period harpoon to fused salt heat exchanging segment, reduce molten salt furnace outlet temperature and system's pressure reduction, cut down the consumption of energy and the extension fixture cycle of operation thereby reach, and be easy in industrial enforcement and the inner tube scab dissolved by fused salt heat exchanging segment Removal Technology applied.
Claims (3)
1. cleaning method for inner tube scab dissolved by fused salt heat exchanging segment, it is characterized in that its scale removal process is to drain pipe material in the fused salt heat exchanging segment stripping clean, to continuing fused salt heat exchanging segment is heated then, utilize pipeline different, scab with two-way interaction's stress rupture and peel off automatically and remove with the expanded by heating coefficient that scabs.
2. a kind of cleaning method for inner tube scab dissolved by fused salt heat exchanging segment according to claim 1 is characterized in that it drains clean process with Guan Shui in the fused salt heat exchanging segment stripping is with changeing water after 1.5 hours, drains interior pipe material clean.
3. a kind of cleaning method for inner tube scab dissolved by fused salt heat exchanging segment according to claim 1 is characterized in that its its scale removal process is 335 ℃ to the temperature of molten salt that continues fused salt heat exchanging segment is heated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910242196A CN101733261A (en) | 2009-12-09 | 2009-12-09 | Cleaning method for inner tube scab dissolved by fused salt heat exchanging segment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910242196A CN101733261A (en) | 2009-12-09 | 2009-12-09 | Cleaning method for inner tube scab dissolved by fused salt heat exchanging segment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101733261A true CN101733261A (en) | 2010-06-16 |
Family
ID=42457585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910242196A Pending CN101733261A (en) | 2009-12-09 | 2009-12-09 | Cleaning method for inner tube scab dissolved by fused salt heat exchanging segment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101733261A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102553864A (en) * | 2010-12-29 | 2012-07-11 | 中国铝业股份有限公司 | Method for cleaning scab of high pressure dissolution system through water dissolution method |
| CN103343360A (en) * | 2013-06-27 | 2013-10-09 | 沈阳铝镁设计研究院有限公司 | Cleaning device for suctorial aluminum tube |
| CN103668325A (en) * | 2012-09-03 | 2014-03-26 | 洛阳豫港龙泉铝业有限公司 | Technology for clearing blocked aluminum electrolysis vacuum ladle aluminum sucking tube |
| CN117427963A (en) * | 2023-12-21 | 2024-01-23 | 无棣县兴亚生物科技有限公司 | Cleaning equipment for vitamin D3 crystallization device |
-
2009
- 2009-12-09 CN CN200910242196A patent/CN101733261A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102553864A (en) * | 2010-12-29 | 2012-07-11 | 中国铝业股份有限公司 | Method for cleaning scab of high pressure dissolution system through water dissolution method |
| CN103668325A (en) * | 2012-09-03 | 2014-03-26 | 洛阳豫港龙泉铝业有限公司 | Technology for clearing blocked aluminum electrolysis vacuum ladle aluminum sucking tube |
| CN103668325B (en) * | 2012-09-03 | 2016-12-21 | 洛阳豫港龙泉铝业有限公司 | Aluminium electroloysis vacuum ladle inhales the stifled real Removal Technology of aluminum pipe |
| CN103343360A (en) * | 2013-06-27 | 2013-10-09 | 沈阳铝镁设计研究院有限公司 | Cleaning device for suctorial aluminum tube |
| CN103343360B (en) * | 2013-06-27 | 2016-01-06 | 沈阳铝镁设计研究院有限公司 | A kind of suction aluminum pipe cleaning plant |
| CN117427963A (en) * | 2023-12-21 | 2024-01-23 | 无棣县兴亚生物科技有限公司 | Cleaning equipment for vitamin D3 crystallization device |
| CN117427963B (en) * | 2023-12-21 | 2024-04-26 | 无棣县兴亚生物科技有限公司 | Cleaning equipment for vitamin D3 crystallization device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203036937U (en) | Closed low-temperature cooling water circulating system | |
| CN101733261A (en) | Cleaning method for inner tube scab dissolved by fused salt heat exchanging segment | |
| CN105154224A (en) | Device and method for recovering heat in oil and fat refining process | |
| CN109877097A (en) | The cleaning method of wet phosphoric acid purifying technique concentration systems | |
| CN113483580A (en) | Anti-freezing system and anti-freezing method for closed cooling tower | |
| CN103656698B (en) | The quick, intelligent continuous sterilizer of fermentation liquid | |
| CN102777351A (en) | Waste heat recycling device and recycling method of oil-free compressor | |
| CN203128596U (en) | Efficient blast furnace slag-washing water waste heat recycling system adopting bottom-filtration process | |
| CN209383883U (en) | A kind of molten copper system system of energy-saving and environment-friendly electrolytic copper foil | |
| CN205119874U (en) | Petrifaction oil refining is cooling device for coker | |
| CN201522128U (en) | Full automatic sewage waste heat recovery device in paper-making industry | |
| CN101849695A (en) | Sterile cooling device in production process of canned foods and process thereof | |
| CN204345765U (en) | Air-cooled Unit high back pressure circulating water heating double parallel operational system | |
| CN204128428U (en) | A kind of self-cleaning air cloth hydrophone | |
| CN204325291U (en) | Coke oven gas thermal method fine treatment device | |
| CN206001735U (en) | A kind of centrifugal refrigerating unit with backwash cleaning device | |
| CN203273271U (en) | Condensate water removing device of steam heating equipment | |
| CN103130264B (en) | There is titanium tetrachloride brass wire tower and the copper wire balls cleaning method thereof of self-cleaning function | |
| CN201357034Y (en) | Adipic acid argon, nitrate and waste gas recovery system | |
| CN103954169A (en) | Method for washing air cooling island of first-startup unit in power plant | |
| CN214087738U (en) | Silicon rod rapid cooling system | |
| CN105417501A (en) | Cooling method for blower in sulfuric acid production | |
| CN214115553U (en) | Temperature rising and falling system of large-scale fermentation tank | |
| CN218914543U (en) | Vertical air storage tank heating drainage device | |
| CN103882186A (en) | Vacuum-pumping device of RH (Ruhrstahl Hereaeus) refining furnace and use method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100616 |