CN107840308A - A kind of iodine retracting device and its recovery method using waste heat boiler exiting flue gas - Google Patents
A kind of iodine retracting device and its recovery method using waste heat boiler exiting flue gas Download PDFInfo
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- CN107840308A CN107840308A CN201711135355.1A CN201711135355A CN107840308A CN 107840308 A CN107840308 A CN 107840308A CN 201711135355 A CN201711135355 A CN 201711135355A CN 107840308 A CN107840308 A CN 107840308A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B7/00—Halogens; Halogen acids
- C01B7/13—Iodine; Hydrogen iodide
- C01B7/14—Iodine
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The present invention relates to iodine recycling field, especially a kind of iodine retracting device and its recovery method using waste heat boiler exiting flue gas, iodine recovery system is introduced by the way that waste heat boiler in sulfur process is exported into sulfur dioxide, iodine molecule is reduced as reducing agent, so that the security of iodine retracting device is improved, the risk of environmentally friendly accident is reduced, adds the continuity and economic benefit of production.
Description
Technical field
The present invention relates to iodine recycling field, especially a kind of iodine retracting device using waste heat boiler exiting flue gas and its return
Receiving method.
Background technology
Iodine is described as biological element, wisdom element, is plant and the indispensable element of growth in humans, be manufacture it is inorganic or
The primary raw material of organic iodide, and the good catalyst of many chemical reactions.Iodate chemical product is widely used in food, doctor
All conglomeraties such as medicine, dyestuff, metallurgy, synthetic rubber, agricultural, national defence hard-core technology.The downstream product of iodine is mostly high added value
Product, such as：Other iodine products such as Potassiumiodate, iodoform, iodate Rhodium, PVP-I and high poly- iodine.And the production method of iodine is main
There is ion-exchange, active carbon adsorption, solvent signal suppression, the precipitation method (copper method and Yin Fa), organic solvent extractionprocess, special
Catalytic oxidation and air extraction etc..Currently, the production capacity of global iodine is about 20kt/a, and the iodine production capacity in China is about 800t/a,
The consumption of iodine is but 3000-4000t/a, and with annual 5% speed increase.
At present, the iodine recovery method employed in phosphoric acid by wet process, most of used in oxidizer catalytic oxidising acid solution
Iodide ion, by air extract blowout method the iodine molecule in solution is blown into absorbing liquid-reductant solution with gas phase, lead to
Cross reducing agent and iodine molecule is reduced to iodide ion, after iodide ion reaches certain value, oxidant is passed through in absorbing liquid, iodide ion
Iodine molecule is oxidized to again, and iodine product is obtained through separation of solid and liquid.
Sulfuric acid acid-making process is substantially：Refined molten sulfur from molten sulphur process, sulfur furnace is sprayed into after used high-pressure pump pressurization,
Sulfur dioxide is obtained with dried air mixed combustion, after waste heat boiler reclaims heat energy, by catalyzed conversion, absorbs, obtains
To the sulfuric acid of high concentration, tail gas is washed through ammonia reaches state environmental emissioning standard, from smoke stack emission.
In the prior art, have much for the correlation technique of iodine recovery, document in phosphoric acid by wet process and fluosilicic acid.For example, trip
Respect cutting edge of a knife or a sword, Wu Youli, Xiang Shuanlong《The absorption technique research of iodine molecule in gas phase》, just to the optimal work of iodine molecule absorption in gas phase
Skill condition is studied, and it is：Using sulfurous acid as reducing agent, sulfurous acid solution mass fraction is 8%, reaction temperature 35
DEG C, the iodine gas phase residence time is 15s.For another example, patent 201610779316.4 just has detailed to phosphoric acid by wet process progress iodine recovery
Description.
But the prior art of iodine recovery at present, the mode not put into production to raw material sulfur dioxide improve to some extent.It is wet
Sulfur dioxide used in the recovery of the iodine of method phosphoric acid and fluosilicic acid is the bottled sulfur dioxide of high concentration liquid, buffered tank decompression
Afterwards iodine retracting device system is introduced with pipeline.
The content of the invention
In order to solve technical problem present in prior art, the invention provides one kind to utilize waste heat boiler exiting flue gas
Iodine retracting device and its recovery method.
It is achieved particular by following technical scheme：
A kind of iodine retracting device using waste heat boiler exiting flue gas, purified by iodine extraction cells, iodine reduction unit, iodine single
Member composition；Iodine extraction cells are connected by pipe a with iodine reduction unit；Iodine reduction unit is connected by pipe b with iodine clean unit.
The pipe a is that the iodine gas in iodine extraction cells is sent into iodine reduction unit；Pipe b is by iodine reduction unit
Iodide ion solution is sent into iodine clean unit.
Iodine extraction cells include：Phosphoric acid,diluted and fluosilicic acid pipeline enter catalysis oxidation groove from top, and dioxygen waterpipe is from top
Portion enters catalysis oxidation groove, and the agitator a in catalysis oxidation groove, catalysis oxidation groove is connected with upper sour pump, upper sour pump and extraction tower
Interior shower nozzle a connections, extraction tower top exit are connected with pipe a, and air blower is connected with extraction tower bottom inlet.
Iodine reduction unit includes：Dry air pipeline enters sulfur furnace, and molten sulfur pipeline enters sulfur furnace, sulfur furnace and used heat
Boiler connects, and waste heat boiler outlet is by pipeline through the pipe between cooling pond, cooling tower bonding pad absorption tower, absorption cycle groove
Road；Pipe a is connected with heat exchanger shell pass entrance, and heat exchanger shell pass outlet is connected with packing material absorbing tower bottom, heat exchanger tube pass outlet
It is connected with cooling tower, cooling tower and cooling pond, cooling pond are connected with charging pump, and charging pump is connected with heat exchanger tube pass entrance；Fill out
Material absorption tower centrum bottom is connected with absorption cycle groove top portion, and absorption cycle groove is connected with circulating pump, circulating pump by threeway and
Shower nozzle b, pipe b connections in packed absorber.
Iodine clean unit includes：Pipe b is connected with first class purification groove, and calcium carbonate groove is connected with first class purification groove, first class purification
Agitator c in groove, first class purification trench bottom are connected with secondary purification groove top portion, and aluminum salt flocculant groove connects with secondary purification groove
Connect, the agitator d in secondary purification groove, secondary purification trench bottom is connected with oxidation analysis iodine groove top portion, and dioxygen tank is analysed with oxidation
Iodine groove is connected, and the agitator e in oxidation analysis iodine groove, oxidation analysis iodine trench bottom is connected with iodine filter, and iodine filter and smart iodine are anti-
Kettle is answered to connect, concentrated sulfuric acid groove is connected with smart Iod R kettle, and smart Iod R kettle outlet at bottom is connected with smart iodine separator.
A kind of method for preparing iodine recovery reducing agent, dry air burns with molten sulfur in sulfur furnace generates sulfur dioxide,
After waste heat boiler reclaims heat energy, the cooling by pipeline by cooling pond and cooling tower, followed into packed absorber and absorption
Pipeline between annular groove, the solution flowed out from packed absorber absorb.
A kind of iodine recovery method using waste heat boiler exiting flue gas, phosphoric acid,diluted and silicate fluoride solution react with hydrogen peroxide
To iodine molecule, in extraction tower, air inversely contacts with solution to be taken iodine molecule out of and enters heat exchanger, is reached filler after cooling and is inhaled
Tower bottom is received, the circulation solution with absorbing sulfur dioxide reacts, when iodide ion concentration reaches 30-70g/L in solution, into two
Level purification tank defluorinate removing heavy-metal, is passed through hydrogen peroxide and obtains iodine molecule again, filtered, in concentrated sulfuric acid natural subsidence, after
Filter, obtains iodine product.
The production process that a kind of iodine using waste heat boiler exiting flue gas reclaims is that dry air passes through dry air pipeline
Into sulfur furnace, the molten sulfur mixed combustion with entering sulfur furnace by molten sulfur pipeline generates sulfur dioxide, returned into waste heat boiler
Heat energy is received, the cooling by pipeline by cooling pond and cooling tower, the pipeline between packed absorber and absorption cycle groove,
The solution flowed out from packed absorber absorbs；Phosphoric acid,diluted and silicate fluoride solution enter catalysis by phosphoric acid,diluted and fluosilicic acid pipeline
Oxidation trough, the hydrogen peroxide with entering catalysis oxidation groove by dioxygen waterpipe react, and iodide ion is oxidized to iodine molecule, after reaction
The shower nozzle a that is pumped to by upper acid in extraction tower of solution sprayed in tower, air blower conveying air carries out reverse with solution in tower
Contact, takes out of after the iodine molecule in solution and enters heat exchanger shell pass through pipe a；Cooling water in heat exchanger enters cooling tower, in weight
The lower nature of power effect flows into cooling pond, then is delivered to circulating cooling in heat exchanger tube pass by charging pump；Iodine molecule gas is by changing
After hot device cooling, into packed absorber, iodide ion is reduced into after being absorbed by the reductant solution that shower nozzle b is sprayed, is together flowed into
Absorption cycle groove, then the shower nozzle b and pipeline b entered by circulating pump by threeway in packed absorber；Iodide ion solution enters one
Level purification tank, solution enter back into secondary purification groove by the calcium carbonate defluorinate from calcium carbonate groove, and from aluminum salt flocculant groove
Aluminum salt flocculant take off lead, mercury, arsenic, enter back into oxidation analysis iodine groove, the hydrogen peroxide of dioxygen tank flows into oxidation analysis iodine groove, in groove
Iodide ion again be oxidized as iodine molecule, after the filtering of iodine filter, into smart Iod R kettle, from concentrated sulfuric acid groove
Natural subsidence in the concentrated sulfuric acid, finally filtered by smart iodine separator, obtain iodine product.
Described cooling tower is connected with cooling pond, is that the cooling water in cooling tower drop to cooling pond naturally.
Compared with prior art, technique effect of the invention is embodied in：
Relative to the existing bottled sulfur dioxide of high concentration liquid used, waste heat boiler exports in sulfuric acid acid manufacturing processes two
Sulfur oxide flue gas provides continuous sulphur dioxide reduction agent to phosphoric acid by wet process and fluosilicic acid iodine retracting device, reduces transport, storage
Dangerous and environmentally friendly risk when depositing, changing steel cylinder, and avoid due to long-distance transport or manufacturer's supply not in time and
Caused by produced on-site interrupt.Market liquid sulfur dioxide purchasing price is expensive simultaneously, and the exiting flue gas of sulphur-burning sulphuric acid plant exists
After being included in cost of material and production supplementary costs, its sulfur dioxide cost savings rate is up to 82.46%, greatly improves phosphoric acid by wet process
And the economic benefit of fluosilicic acid iodine retracting device.
Brief description of the drawings
Fig. 1 is the connection relationship diagram of apparatus of the present invention.
1 relation structure diagram in Fig. 2 bitmaps 1.
Fig. 3 is in Fig. 12 relation structure diagram.
Fig. 4 is in Fig. 13 relation structure diagram.
1- iodine extraction cells 2- iodine reduction unit 3- iodine clean unit 4- pipe a 5- pipes b
On 1.1- phosphoric acid,diluteds and the catalysis oxidation groove 1.4- agitators 1.5- of fluosilicic acid pipeline 1.2- dioxygens waterpipe 1.3
Sour pump 1.6- extraction towers 1.7- shower nozzle a 1.8- air blowers
2.1- dry air pipeline 2.2- molten sulfur pipeline 2.3- sulfur furnace 2.4- waste heat boiler 2.5- cooling pond 2.6-
Cooling tower 2.7- charging pump 2.8- heat exchanger 2.9- packed absorber 2.10- shower nozzle b 2.11- absorption cycle grooves 2.12-
Circulating pump
3.1- first class purification groove 3.2- agitator c 3.3- calcium carbonate groove 3.4- secondary purification groove 3.5- agitators d
The iodine filter 3.11- essences of 3.6- aluminum salt flocculant grooves 3.7- oxidation analysis iodine groove 3.8- agitator e 3.9- dioxygens tank 3.10
Iod R kettle 3.12- concentrated sulfuric acid groove 3.13- essence iodine separating tanks
Embodiment
Limited technical scheme is further, but required with specific embodiment below in conjunction with the accompanying drawings
The scope of protection is not only limited to made description.
Embodiment
As shown in figure 1, a kind of iodine retracting device using waste heat boiler exiting flue gas, is reduced single by iodine extraction cells 1, iodine
Member 2, iodine clean unit 3 form；Iodine extraction cells 1 are connected by pipe a4 with iodine reduction unit 2；Iodine reduction unit 2 passes through pipe b5
It is connected with iodine clean unit 3.
Pipe a4 is that the iodine gas in iodine extraction cells 1 is sent into iodine reduction unit 2；Pipe b5 is by iodine reduction unit 2
Iodide ion solution be sent into iodine clean unit 3.
As shown in Figure 1 and Figure 2, in certain embodiments, described iodine extraction cells 1 include：Phosphoric acid,diluted and fluosilicic acid pipeline
1.1 enter catalysis oxidation groove 1.3 from top, and dioxygen waterpipe 1.2 enters catalysis oxidation groove 1.3, catalysis oxidation groove 1.3 from top
Interior agitator a1.4, catalysis oxidation groove 1.3 are connected with upper sour pump 1.5, and upper sour pump 1.5 connects with shower nozzle a1.7 in extraction tower 1.6
Connect, the top exit of extraction tower 1.6 is connected with pipe a4, and air blower 1.8 is connected with the bottom inlet of extraction tower 1.6.
As shown in Figure 1, Figure 3, in certain embodiments, described iodine reduction unit 2 includes：Dry air pipeline 2.1 enters
Enter sulfur furnace 2.3, molten sulfur pipeline 2.2 enters sulfur furnace 2.3, and sulfur furnace 2.3 is connected with waste heat boiler 2.4, and waste heat boiler 2.4 goes out
Mouth is by pipeline through the pipeline between cooling pond 2.5, the bonding pad absorption tower 2.9 of cooling tower 2.6, absorption cycle groove 2.11；Pipe
A4 is connected with the shell side inlet of heat exchanger 2.8, and the shell-side outlet of heat exchanger 2.8 is connected with the bottom of packed absorber 2.9, heat exchanger 2.8
Tube side outlet is connected with cooling tower 2.6, and cooling tower 2.6 is connected with cooling pond 2.5, and cooling pond 2.5 is connected with charging pump 2.7, on
Water pump 2.7 is connected with the tube-side inlet of heat exchanger 2.8；The centrum bottom of packed absorber 2.9 is connected with the top of absorption cycle groove 2.11,
Absorption cycle groove 2.11 is connected with circulating pump 2.12, circulating pump 2.12 by shower nozzle b2.10 in threeway and packed absorber 2.9,
Pipe b5 connections.
As Figure 1 and Figure 4, described iodine clean unit 3 includes in certain embodiments：Pipe b5 and first class purification groove 3.1
Connection, calcium carbonate groove 3.3 are connected with first class purification groove 3.1, the agitator c3.2 in first class purification groove 3.1, first class purification groove 3.1
Bottom is connected with the top of secondary purification groove 3.4, and aluminum salt flocculant groove 3.6 is connected with secondary purification groove 3.4, secondary purification groove 3.4
Interior agitator d3.5, the bottom of secondary purification groove 3.4 are connected with the top of oxidation analysis iodine groove 3.7, dioxygen tank 3.9 and oxidation analysis iodine
Groove 3.7 is connected, the agitator e3.8 in oxidation analysis iodine groove 3.7, and the bottom of oxidation analysis iodine groove 3.7 is connected with iodine filter 3.10, iodine
Filter 3.10 is connected with smart Iod R kettle 3.11, and concentrated sulfuric acid groove 3.12 is connected with smart Iod R kettle 3.11, smart Iod R kettle
3.11 outlet at bottoms are connected with smart iodine separator 3.13.
In certain embodiments, preparing the method for iodine recovery reducing agent is：Dry air is with molten sulfur in the internal combustion of sulfur furnace 2.3
Generation sulfur dioxide is burnt, after waste heat boiler 2.4 reclaims heat energy, by pipeline by the cold of cooling pond 2.5 and cooling tower 2.6
But, into the pipeline between packed absorber 2.9 and absorption cycle groove 2.11, the solution flowed out from packed absorber 2.9 is inhaled
Receive.
In certain embodiments, it is using the iodine recovery method of waste heat boiler exiting flue gas：Phosphoric acid,diluted and silicate fluoride solution
React to obtain iodine molecule with hydrogen peroxide, in extraction tower 1.6, air inversely contacts with solution to be taken iodine molecule out of and enter heat exchanger
2.8, reach packed absorber 2.9 bottom after cooling, the circulation solution with absorbing sulfur dioxide reacts, when in solution iodine from
Sub- concentration reaches 30-70g/L, into two-step purification groove defluorinate removing heavy-metal, is passed through hydrogen peroxide again and obtains iodine molecule, passes through
Filter, natural subsidence, is refiltered in concentrated sulfuric acid, obtains iodine product.
Claims (7)
1. a kind of iodine retracting device using waste heat boiler exiting flue gas, it is characterised in that reduced by iodine extraction cells (1), iodine
Unit (2), iodine clean unit (3) composition；Iodine extraction cells (1) are connected by pipe a (4) with iodine reduction unit (2)；Iodine reduction is single
First (2) are connected by pipe b (5) with iodine clean unit (3).
A kind of 2. iodine retracting device using waste heat boiler exiting flue gas as claimed in claim 1, it is characterised in that pipe a (4)
It is that the iodine gas in iodine extraction cells (1) is sent into iodine reduction unit (2)；Pipe b (5) be by the iodine in iodine reduction unit (2) from
Sub- solution is sent into iodine clean unit (3).
A kind of 3. iodine retracting device using waste heat boiler exiting flue gas as claimed in claim 1 or 2, it is characterised in that institute
The iodine extraction cells (1) stated include：Phosphoric acid,diluted and fluosilicic acid pipeline (1.1) enter catalysis oxidation groove (1.3), hydrogen peroxide from top
Pipeline (1.2) enters catalysis oxidation groove (1.3) from top, the agitator a (1.4) in catalysis oxidation groove (1.3), catalysis oxidation groove
(1.3) it is connected with upper sour pump (1.5), upper sour pump (1.5) shower nozzle a (1.7) interior with extraction tower (1.6) is connected, extraction tower (1.6) top
Portion outlet is connected with pipe a (4), and air blower (1.8) is connected with extraction tower (1.6) bottom inlet.
A kind of 4. iodine retracting device using waste heat boiler exiting flue gas as claimed in claim 1 or 2, it is characterised in that institute
The iodine reduction unit (2) stated includes：Dry air Gu Na islands (2.1) enter sulfur furnace (2.3), and molten sulfur pipeline (2.2), which enters, to be burnt
Sulphur stove (2.3), sulfur furnace (2.3) are connected with waste heat boiler (2.4), and waste heat boiler (2.4) outlet is by pipeline through cooling pond
(2.5), the pipeline between cooling tower (2.6) bonding pad absorption tower (2.9), absorption cycle groove (2.11)；Pipe a (4) and heat exchange
Device (2.8) shell side inlet is connected, and heat exchanger (2.8) shell-side outlet is connected with packed absorber (2.9) bottom, heat exchanger (2.8)
Tube side outlet is connected with cooling tower (2.6), and cooling tower (2.6) is connected with cooling pond (2.5), cooling pond (2.5) and charging pump
(2.7) connect, charging pump (2.7) is connected with heat exchanger (2.8) tube-side inlet；Packed absorber (2.9) centrum bottom is with absorbing
Connected at the top of circulating slot (2.11), absorption cycle groove (2.11) is connected with circulating pump (2.12), and circulating pump (2.12) passes through threeway
Shower nozzle b (2.10) interior with packed absorber (2.9), pipe b (5) are connected.
A kind of 5. iodine retracting device using waste heat boiler exiting flue gas as claimed in claim 1 or 2, it is characterised in that institute
The iodine clean unit (3) stated includes：Pipe b (5) is connected with first class purification groove (3.1), calcium carbonate groove (3.3) and first class purification groove
(3.1) connect, the agitator c (3.2) in first class purification groove (3.1), first class purification groove (3.1) bottom and secondary purification groove
(3.4) top is connected, and aluminum salt flocculant groove (3.6) is connected with secondary purification groove (3.4), the stirring in secondary purification groove (3.4)
Device d (3.5), secondary purification groove (3.4) bottom at the top of oxidation analysis iodine groove (3.7) with being connected, dioxygen tank (3.9) and oxidation analysis iodine
Groove (3.7) connects, the agitator e (3.8) in oxidation analysis iodine groove (3.7), oxidation analysis iodine groove (3.7) bottom and iodine filter
(3.10) connect, iodine filter (3.10) is connected with smart Iod R kettle (3.11), concentrated sulfuric acid groove (3.12) and smart Iod R kettle
(3.11) connect, smart Iod R kettle (3.11) outlet at bottom is connected with smart iodine separator (3.13).
A kind of 6. method for preparing iodine recovery reducing agent, it is characterised in that dry air burns with molten sulfur in sulfur furnace (2.3)
Sulfur dioxide is generated, after waste heat boiler (2.4) reclaims heat energy, by pipeline by cooling pond (2.5) and cooling tower (2.6)
Cooling, the pipeline between packed absorber (2.9) and absorption cycle groove (2.11), flowed out from packed absorber (2.9)
Solution absorb.
7. a kind of iodine recovery method using waste heat boiler exiting flue gas, phosphoric acid,diluted and silicate fluoride solution react to obtain with hydrogen peroxide
Iodine molecule, in the extraction tower (1.6), air inversely contacts with solution to be taken iodine molecule out of and enters heat exchanger (2.8), is arrived after cooling
Up to packed absorber (2.9) bottom, the circulation solution with absorbing sulfur dioxide reacts, when iodide ion concentration reaches in solution
30-70g/L, into two-step purification groove defluorinate removing heavy-metal, hydrogen peroxide is passed through again and obtains iodine molecule, it is filtered, in the concentrated sulfuric acid
Middle natural subsidence, is refiltered, and obtains iodine product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711135355.1A CN107840308A (en) | 2017-11-16 | 2017-11-16 | A kind of iodine retracting device and its recovery method using waste heat boiler exiting flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711135355.1A CN107840308A (en) | 2017-11-16 | 2017-11-16 | A kind of iodine retracting device and its recovery method using waste heat boiler exiting flue gas |
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| CN107840308A true CN107840308A (en) | 2018-03-27 |
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| CN201711135355.1A Pending CN107840308A (en) | 2017-11-16 | 2017-11-16 | A kind of iodine retracting device and its recovery method using waste heat boiler exiting flue gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110585862A (en) * | 2019-09-20 | 2019-12-20 | 瓮福达州化工有限责任公司 | Iodine recovery system of phosphoric acid concentration workshop section |
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| CN101318626A (en) * | 2008-07-10 | 2008-12-10 | 贵州大学 | Apparatus for recycling iodine from diluted phosphoric acid for phosphoric acid manufacture with wet-process |
| CN101885474A (en) * | 2010-06-17 | 2010-11-17 | 莱州诚源盐化有限公司 | Special sulphur combustion furnace for producing bromine by air blowing-out process |
| CN102730642A (en) * | 2012-06-29 | 2012-10-17 | 贵州开磷（集团）有限责任公司 | Gas-liquid mixed extraction iodine recovery technology |
| CN103395747A (en) * | 2013-08-05 | 2013-11-20 | 贵州开磷（集团）有限责任公司 | Method for simultaneously recovering iodine in iodine-containing fluosilicic acid and iodine-containing dilute phosphoric acid |
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2017
- 2017-11-16 CN CN201711135355.1A patent/CN107840308A/en active Pending
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| CN101318626A (en) * | 2008-07-10 | 2008-12-10 | 贵州大学 | Apparatus for recycling iodine from diluted phosphoric acid for phosphoric acid manufacture with wet-process |
| CN101885474A (en) * | 2010-06-17 | 2010-11-17 | 莱州诚源盐化有限公司 | Special sulphur combustion furnace for producing bromine by air blowing-out process |
| CN102730642A (en) * | 2012-06-29 | 2012-10-17 | 贵州开磷（集团）有限责任公司 | Gas-liquid mixed extraction iodine recovery technology |
| CN103395747A (en) * | 2013-08-05 | 2013-11-20 | 贵州开磷（集团）有限责任公司 | Method for simultaneously recovering iodine in iodine-containing fluosilicic acid and iodine-containing dilute phosphoric acid |
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| CN110585862A (en) * | 2019-09-20 | 2019-12-20 | 瓮福达州化工有限责任公司 | Iodine recovery system of phosphoric acid concentration workshop section |
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