CN110155976A - A method of reducing wet phosphoric acid extracting bath liquid level protection top erosion resistant coating - Google Patents
A method of reducing wet phosphoric acid extracting bath liquid level protection top erosion resistant coating Download PDFInfo
- Publication number
- CN110155976A CN110155976A CN201910290700.1A CN201910290700A CN110155976A CN 110155976 A CN110155976 A CN 110155976A CN 201910290700 A CN201910290700 A CN 201910290700A CN 110155976 A CN110155976 A CN 110155976A
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- Prior art keywords
- phosphoric acid
- overflow port
- type overflow
- area
- liquid level
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
- B01D11/04—Solvent extraction of solutions which are liquid
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/46—Preparation involving solvent-solvent extraction
Abstract
The invention belongs to phosphorous chemical industry equipment anticorrosion field, especially a kind of method for reducing wet phosphoric acid extracting bath liquid level protection top erosion resistant coating.6/7th area of phosphoric acid extraction slot and 8/9 area's V-type overflow port are reduced 25cm, 30cm in the case where determining does not influence wet method phosphoric acid manufacture process by the present invention respectively, and the area 1-8 entirety liquid level can be reduced to 25cm, and 9 area's liquid levels reduce 30cm；Increase gas phase portion space in slot, temperature significantly reduces after increasing space, can corrosion of the high-temperature acid mist gas phase portion to top effectively in dashpot, substantially reduce its high temperature corrosion intensity；Service life of equipment and time between overhaul can be extended, increase Homes Using TV, can ensure equipment safety stable operation.
Description
Technical field
The invention belongs to phosphorous chemical industry equipment anticorrosion fields, especially a kind of reduction wet phosphoric acid extracting bath liquid level protection top
The method of protective layer.
Background technique
Phosphoric acid extraction slot is made of armored concrete, shares nine areas, is the heart in wet method phosphoric acid manufacture process,
Have the deep-etchings acid medium such as sulfuric acid, high-concentration phosphoric acid, hydrofluoric acid, fluosilicic acid in working condition, and for a long time 80 DEG C with
Run at a high temperature of upper, especially two, the instantaneous temperature of 3rd area addition sulfuric acid be more up to 150 DEG C or more, it is multiple easily to form high temperature
Miscellaneous ingredient acid mist gas phase media；And common anti-corrosion material is chlorinated butyl offset plate, chlorinated butyl offset plate at the top of phosphoric acid reaction tank
Heatproof is probably at 120 DEG C or so, and under high liquid level operating condition, closer at the top of fluid level contacts, the temperature for forming acid mist is higher, meeting
Extraction tank groove top anti-rot protection material is caused to seriously threaten, burn, rate of ageing are formed to top chlorinated butyl offset plate
Aggravation, causes corrosion failure to concrete substrate, forms serious security risk.
Currently, phosphoric acid extraction slot liquid level during Wet-process Phosphoric Acid Production keeps at least 5.7 meters or more for a long time, in this height
In the case where liquid, the corrosive liquids and acid mist splash when adding sulfuric acid can cause to burn and corrode to top offset plate, make to extract
Groove top portion erosion resistant coating becomes the hidden danger key area that is corroded for a long time, annual to check that maintenance is time-consuming and laborious, influences Homes Using TV, influences to produce
Amount.It is, thus, sought for a kind of method that can solve problem, not only otherwise influences the technique requirement in production, but also can effectively control
The liquid of phosphoric acid extraction slot internal corrosion liquid processed reduces acid mist to the corrosion impact of top anti-corrosion material.
Summary of the invention
In order to solve the above technical problems existing in the prior art, the present invention provides a kind of extractions of reduction phosphoric acid by wet process
The method of tank liquor position protection top erosion resistant coating, is realized particular by following technical scheme:
The present invention is using reduction by 6/7th area of phosphoric acid extraction slot and the method for the height of 8/9 area's V-type overflow port, such as 1 institute of attached drawing
Show, i.e., V-type overflow port is to the height 6 at the top of it before increase phosphoric acid extraction slot；Thus to realize the liquid to slot internal corrosion liquid
The control of position；Researcher of the present invention also passes through repeatedly the study found that the 6/7th area of phosphoric acid extraction slot, the 8/9th area's V-type overflow port
When reducing 20-25cm, 30-35cm respectively, phosphoric acid extraction slot 1-8 area's entirety liquid level can be reduced 20-25cm, the 9th area's liquid level
Reduce 30-35cm.
A method of wet phosphoric acid extracting bath liquid level protection top erosion resistant coating is reduced, following work progress is specifically included:
(1) cleaning reduces V-type overflow port: marking reduces position, clears up carbon brick；Presulfurization butyl rubber plate is cleared up, in advance
Reserve lap position；V-type overflow port reinforced concrete floor is reduced, 6/7th area reduces 20-25cm, and 8/9th area reduces 30-35cm；
(2) epoxy resin mortar is levelling: cleaning concrete surface；After being wiped with acetone, brush concrete bottom coating, epoxy resin mortar is repaired
It mends to smooth, solidifies 24-48 hours, the specific time is depending on temperature conditions；
(3) line with rubber, lining brick: cleaning epoxy resin mortar surface, matrix grinding process；Cleaning agent wiping, scrapes 2mm thickness conductive layer,
Polishing, brush primary coat and rubber cement bonding agent；Serve as a contrast one layer of 4mm thickness presulfurization chlorinated butyl rubber；2mm thickness furan mastic serves as a contrast 65mm carbon brick two
Layer；
(4) stainless steel cutting ferrule is installed: being solidified 24-48 hours to lining brick, the specific time depending on temperature conditions, clears up table
Face；V-type overflow port installs one layer of 10mm thickness 316L stainless steel, flange width 20-25cm.It is stainless to protect V-type overflow port anti-corrosion
Layer, avoids washing away crack corrosion by acid for a long time.
The beneficial effects of the present invention are:
Present invention determine that the case where not influencing wet method phosphoric acid manufacture process, by by 6/7th area of phosphoric acid extraction slot and 8/9th area
V-type overflow open height reduces 20-25cm and 30-35cm respectively, the whole liquid level in the area 1-8 can be reduced 20-25cm, the 9th
The liquid level in area reduces 30-35cm, increases gas phase portion space in slot, and temperature significantly reduces after increasing space, can be effective
Corrosion of the high-temperature acid mist gas phase portion to top in dashpot substantially reduces its high temperature corrosion intensity；Effectively extend equipment
Service life and time between overhaul, increase Homes Using TV, can ensure equipment safety stable operation.
Detailed description of the invention
Fig. 1 is phosphoric acid extraction slot V-type overflow port structural schematic diagram
Fig. 2 is the structural schematic diagram before phosphoric acid extraction slot V-type overflow port does not reduce.
Fig. 3 is the structural schematic diagram after 6/7 area's V-type overflow port of phosphoric acid extraction slot reduces.
Fig. 4 is the structural schematic diagram after 8/9 area's V-type overflow port of phosphoric acid extraction slot reduces.
Fig. 5 is diagrammatic cross-section after phosphoric acid extraction slot V-type overflow port reduces.
1-C35 armored concrete, 2-132mm thickness carbon brick, 3-10mm thickness stainless steel, 4-4mm thickness line with rubber, 5- flange width
V-type overflow port is to the height at the top of it before 20-25cm, 6- phosphoric acid extraction slot.
Fig. 6 is that extraction tank V-type overflow port scrapes the construction drawing after the completion of conductive layer.
Fig. 7 be extraction tank V-type overflow port line with rubber it is complete after just after the completion of construction drawing.
Fig. 8 is that extraction tank V-type overflow stainless steel cutting ferrule installs rear construction drawing.
Specific embodiment
It is limited below with reference to specific embodiment technical solution of the present invention is further, but claimed
Range is not only limited to made description.
Embodiment 1
A method of wet phosphoric acid extracting bath liquid level protection top erosion resistant coating is reduced, following work progress is specifically included:
(1) cleaning reduces V-type overflow port: phosphoric acid extraction slot V-type overflow port is as shown in Fig. 1 before not constructing, phosphoric acid extraction
Before slot V-type overflow port to the height 6 at the top of it be 2235mm, V-type overflow port line with rubber 4mm, carbon brick thickness 132mm；Then it marks
Position is reduced, carbon brick is cleared up；Presulfurization butyl rubber plate is cleared up, lap position is reserved；Reduce V-type overflow port armored concrete
Layer, 6/7th area reduce 25cm, and 8/9th area reduces 30cm；
(2) epoxy resin mortar is levelling: cleaning concrete surface；After being wiped with acetone, brush concrete bottom coating, epoxy resin mortar is repaired
It mends to smooth, solidification is for 24 hours；
(3) line with rubber, lining brick: cleaning epoxy resin mortar surface, matrix grinding process；Cleaning agent wiping, scrapes 2mm thickness conductive layer,
Polishing, brush primary coat and rubber cement bonding agent；Serve as a contrast one layer of 4mm thickness presulfurization chlorinated butyl rubber；2mm thickness furan mastic serves as a contrast 65mm carbon brick two
Layer.
(4) stainless steel cutting ferrule is installed: after lining brick solidification for 24 hours, clearing up surface；V-type overflow port installs 10mm thickness 316L not
One layer of steel of rust, flange width 20cm；I.e. construction is completed.
The structural schematic diagram that 6/7 area's V-type overflow port of phosphoric acid extraction slot reduces after the completion of 25cm construction is as shown in Fig. 2, phosphorus
Before acid extraction slot V-type overflow port to the height 6 at the top of it be 2485mm.
The structural schematic diagram that 8/9 area's V-type overflow port of phosphoric acid extraction slot reduces after the completion of 25cm construction is as shown in Fig. 3, phosphorus
Before acid extraction slot V-type overflow port to the height 6 at the top of it be 2535mm.
Embodiment 2
A method of wet phosphoric acid extracting bath liquid level protection top erosion resistant coating is reduced, following work progress is specifically included:
(2) cleaning reduces V-type overflow port: phosphoric acid extraction slot V-type overflow port is as shown in Fig. 1 before not constructing, phosphoric acid extraction
Before slot V-type overflow port to the height 6 at the top of it be 2235mm, V-type overflow port line with rubber 4mm, carbon brick thickness 132mm；Then it marks
Position is reduced, carbon brick is cleared up；Presulfurization butyl rubber plate is cleared up, lap position is reserved；Reduce V-type overflow port armored concrete
Layer, 6/7th area reduce 22cm, and 8/9th area reduces 32cm；
(2) epoxy resin mortar is levelling: cleaning concrete surface；After being wiped with acetone, brush concrete bottom coating, epoxy resin mortar is repaired
It mends to smooth, solidification 40h；
(3) line with rubber, lining brick: cleaning epoxy resin mortar surface, matrix grinding process；Cleaning agent wiping, scrapes 2mm thickness conductive layer,
Polishing, brush primary coat and rubber cement bonding agent；Serve as a contrast one layer of 4mm thickness presulfurization chlorinated butyl rubber；2mm thickness furan mastic serves as a contrast 65mm carbon brick two
Layer.
(4) stainless steel cutting ferrule is installed: after lining brick solidifies 36h, clearing up surface；V-type overflow port installs 10mm thickness 316L not
One layer of steel of rust, flange width 23cm；I.e. construction is completed.
The structural schematic diagram that 6/7 area's V-type overflow port of phosphoric acid extraction slot reduces after the completion of 25cm construction is as shown in Fig. 2, phosphorus
Before acid extraction slot V-type overflow port to the height 6 at the top of it be 2455mm.
The structural schematic diagram that 8/9 area's V-type overflow port of phosphoric acid extraction slot reduces after the completion of 25cm construction is as shown in Fig. 3, phosphorus
Before acid extraction slot V-type overflow port to the height 6 at the top of it be 2555mm.
Embodiment 3
A method of wet phosphoric acid extracting bath liquid level protection top erosion resistant coating is reduced, following work progress is specifically included:
(3) cleaning reduces V-type overflow port: phosphoric acid extraction slot V-type overflow port is as shown in Fig. 1 before not constructing, phosphoric acid extraction
Before slot V-type overflow port to the height 6 at the top of it be 2235mm, V-type overflow port line with rubber 4mm, carbon brick thickness 132mm；Then it marks
Position is reduced, carbon brick is cleared up；Presulfurization butyl rubber plate is cleared up, lap position is reserved；Reduce V-type overflow port armored concrete
Layer, 6/7th area reduce 20cm, and 8/9th area reduces 35cm；
(2) epoxy resin mortar is levelling: cleaning concrete surface；After being wiped with acetone, brush concrete bottom coating, epoxy resin mortar is repaired
It mends to smooth, solidification 48h；
(3) line with rubber, lining brick: cleaning epoxy resin mortar surface, matrix grinding process；Cleaning agent wiping, scrapes 2mm thickness conductive layer,
Polishing, brush primary coat and rubber cement bonding agent；Serve as a contrast one layer of 4mm thickness presulfurization chlorinated butyl rubber；2mm thickness furan mastic serves as a contrast 65mm carbon brick two
Layer.
(4) stainless steel cutting ferrule is installed: after lining brick solidifies 48h, clearing up surface；V-type overflow port installs 10mm thickness 316L not
One layer of steel of rust, flange width 25cm；I.e. construction is completed.
The structural schematic diagram that 6/7 area's V-type overflow port of phosphoric acid extraction slot reduces after the completion of 25cm construction is as shown in Fig. 2, phosphorus
Before acid extraction slot V-type overflow port to the height 6 at the top of it be 2435mm.
The structural schematic diagram that 8/9 area's V-type overflow port of phosphoric acid extraction slot reduces after the completion of 25cm construction is as shown in Fig. 3, phosphorus
Before acid extraction slot V-type overflow port to the height 6 at the top of it be 2585mm.
Experimental example
Before phosphoric acid extraction slot V-type overflow port does not reduce, phosphoric acid extraction slot is run 1 year or so, phosphoric acid extraction groove top portion anti-corrosion
Offset plate in layer is largely corroded；Phosphoric acid extraction slot V-type overflow port press in method provided by the invention reduce, phosphoric acid extraction
Slot is run 1 year or so, and slight aging phenomenon only occurs in the offset plate at the top of extraction tank in erosion resistant coating.
It is important to point out that, above embodiments and test example are only limitted to do further technical solution of the present invention herein
Elaboration and understanding, should not be understood as it is further to technical solution of the present invention limited, what those skilled in the art made
The innovation and creation of non-protruding essential characteristics and marked improvement still fall within protection category of the invention.
Claims (6)
1. a kind of method for reducing wet phosphoric acid extracting bath liquid level protection top erosion resistant coating, which is characterized in that reduce phosphoric acid extraction
The height of 6/7 area's V-type overflow port of slot, 8/9 area's V-type overflow port.
2. reducing the method for wet phosphoric acid extracting bath liquid level protection top erosion resistant coating as described in claim 1, which is characterized in that
6/7 area's V-type overflow port of phosphoric acid extraction slot, 8/9 area's V-type overflow port height reduce 20-25cm and 30-35cm respectively.
3. reducing the method for wet phosphoric acid extracting bath liquid level protection top erosion resistant coating as described in claim 1, which is characterized in that
Including following work progress:
(1) cleaning reduces V-type overflow port: it is marked in V-type overflow port and needs reduced position, cleaning carbon brick, vulcanization butyl rubber
Offset plate, and reserve lap position；Then V-type overflow port reinforced concrete floor is reduced, 6/7 area's V-type overflow port reduces 20-
25cm, 8/9 area's V-type overflow port reduce 30-35cm；
(2) epoxy resin mortar is levelling: cleaning V-type overflow port concrete surface, after being wiped with cleaning agent, brush concrete bottom coating, and ring
Oxygen mortar is repaired to smooth, solidification；
(3) line with rubber, lining brick: cleaning epoxy resin mortar surface, matrix grinding process；After cleaning agent wiping, one layer of conductive layer is scraped, is beaten
Mill, brush primary coat and rubber cement bonding agent；Then one layer of presulfurization chlorinated butyl rubber is served as a contrast；It is served as a contrast two layers of carbon brick with furan mastic again；
(4) stainless steel cutting ferrule is installed: after lining brick completes solidification, clearing up surface；V-type overflow port installs one layer of 316L stainless steel,
Flange width 20-25cm.
4. reducing the method for wet phosphoric acid extracting bath liquid level protection top erosion resistant coating as claimed in claim 3, which is characterized in that
The cleaning agent is acetone.
5. reducing the method for wet phosphoric acid extracting bath liquid level protection top erosion resistant coating as claimed in claim 3, which is characterized in that
The step (3), conductive layer with a thickness of 2mm, presulfurization chlorinated butyl rubber with a thickness of 4mm, carbon brick with a thickness of 65mm.
6. reducing the method for wet phosphoric acid extracting bath liquid level protection top erosion resistant coating as claimed in claim 3, which is characterized in that
The step (4), stainless steel with a thickness of 10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910290700.1A CN110155976A (en) | 2019-04-11 | 2019-04-11 | A method of reducing wet phosphoric acid extracting bath liquid level protection top erosion resistant coating |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910290700.1A CN110155976A (en) | 2019-04-11 | 2019-04-11 | A method of reducing wet phosphoric acid extracting bath liquid level protection top erosion resistant coating |
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| CN110155976A true CN110155976A (en) | 2019-08-23 |
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| CN201910290700.1A Pending CN110155976A (en) | 2019-04-11 | 2019-04-11 | A method of reducing wet phosphoric acid extracting bath liquid level protection top erosion resistant coating |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111255047A (en) * | 2020-01-21 | 2020-06-09 | 贵州开磷集团矿肥有限责任公司 | Safety and environment-friendly protection construction method for chemical plant device |
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|---|---|---|---|---|
| GB1081891A (en) * | 1964-07-21 | 1967-09-06 | Occidental Res & Eng | Improvements relating to the production of phosphoric acids |
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| CN104588381A (en) * | 2014-12-30 | 2015-05-06 | 铜陵鑫克精细化工有限责任公司 | Cleaning method for extraction plant capable of purifying wet process phosphoric acid with solvent extraction method |
| CN106672931A (en) * | 2017-02-24 | 2017-05-17 | 广西越洋生物技术有限公司 | Method and equipment for producing polyphosphoric acid with wet process phosphoric acid |
| CN108096876A (en) * | 2017-11-17 | 2018-06-01 | 贵州开磷集团矿肥有限责任公司 | Top method of inhibiting corrosion in a kind of phosphoric acid extraction slot |
-
2019
- 2019-04-11 CN CN201910290700.1A patent/CN110155976A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1081891A (en) * | 1964-07-21 | 1967-09-06 | Occidental Res & Eng | Improvements relating to the production of phosphoric acids |
| CN1654317A (en) * | 2004-12-24 | 2005-08-17 | 贵州宏福实业开发有限总公司 | Purified wet-process technique for producing phosphoric acid and equipment thereof |
| CN104588381A (en) * | 2014-12-30 | 2015-05-06 | 铜陵鑫克精细化工有限责任公司 | Cleaning method for extraction plant capable of purifying wet process phosphoric acid with solvent extraction method |
| CN106672931A (en) * | 2017-02-24 | 2017-05-17 | 广西越洋生物技术有限公司 | Method and equipment for producing polyphosphoric acid with wet process phosphoric acid |
| CN108096876A (en) * | 2017-11-17 | 2018-06-01 | 贵州开磷集团矿肥有限责任公司 | Top method of inhibiting corrosion in a kind of phosphoric acid extraction slot |
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| Title |
|---|
| SCHORR, M ET AL: ""Phosphate ore processing for phosphoric acid production: classical and novel technology"", 《TRANSACTIONS OF THE INSTITUTIONS OF MINING AND METALLURGY SECTION C-MINERAL PROCESSING AND EXTRACTIVE METALLURGY》 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111255047A (en) * | 2020-01-21 | 2020-06-09 | 贵州开磷集团矿肥有限责任公司 | Safety and environment-friendly protection construction method for chemical plant device |
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Effective date of registration: 20220623 Address after: 550000 No. 23, Jinqi Road, Jinzhong Town, Kaiyang County, Guiyang City, Guizhou Province Applicant after: GUIZHOU KAILIN GROUP Co.,Ltd. Address before: 550302 Jinzhong Town, Kaiyang County, Guiyang City, Guizhou Province (No. 2 office building) Applicant before: GUIZHOU KAILIN GROUP MINERAL FERTILIZER Co.,Ltd. |
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