CN207581377U - Sulfuric acid method titanium pigment hydrolysis terminates low level heat recovery system in material - Google Patents
Sulfuric acid method titanium pigment hydrolysis terminates low level heat recovery system in material Download PDFInfo
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- CN207581377U CN207581377U CN201721609060.9U CN201721609060U CN207581377U CN 207581377 U CN207581377 U CN 207581377U CN 201721609060 U CN201721609060 U CN 201721609060U CN 207581377 U CN207581377 U CN 207581377U
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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
Abstract
The utility model is related to a kind of titanium white production Processes and apparatus, specifically disclose a kind of sulfuric acid method titanium pigment hydrolysis and terminate low level heat recovery system in material, are included in the dense titanium liquid storage tank being sequentially connected on liquid phase path, preheater, hydrolyzer, cooler, one washes filter press；Further include dividing wall type heat exchanger, dividing wall type heat exchanger is equipped with the first heat exchange chamber and the second heat exchange chamber being separated by by heat-transfer area, first heat exchange chamber is connected on the process pipe between dense titanium liquid storage tank and preheater, and second heat exchange chamber is connected on the process pipe between hydrolyzer and cooler.The utility model has the advantages that：1) production ton titanium dioxide can reduce about 0.20 ton of steam consumption, save about 10 side of fresh water；2) since the reduction of System steam consumption is corresponding so that two processing costs for washing steam reduce；3) conducive to industrially promoting.
Description
Technical field
The utility model is related to a kind of titanium white production equipment, especially a kind of sulfuric acid method titanium pigment production equipment.
Background technology
Titanium dioxide is important white pigment and porcelain glaze, relatively has superior whiteness, coloring with other white pigments
Power, covering power, weatherability, heat resistance and chemical stability, particularly no toxicity, be at present in the world performance it is best one
Kind white pigment is widely used in the industry such as coating, plastics, papermaking, printing ink, chemical fibre, rubber, cosmetics.
Domestic typical Production By Sulfuric Acid Process titanium white is mainly made of following several processes：Raw ore crushes；With sulfuric acid decomposition essence
Ore deposit produces thick titanyl sulfate solution；Solution sedimentation removal of impurities, cooling is except iron；Smart solution filtration, purification again, is concentrated to give refined sulphur
Sour oxygen titanium solution；Metatitanic acid is precipitated in the hydrolysis of refined sulfuric acid oxygen titanium solution；Metatitanic acid calcining is made titanium dioxide and according to difference
Purposes carries out various post processings to make up its photolytic activity defect, and change its surface nature to calcining gained titanium dioxide.
Post processing includes precomminution, is sanded, classification, inorganic and organic surface-coating processing, filtering, dry, air-flow crushing and metering packet
Dress etc., so as to good, the high whiteness that obtains surface nature, the high rutile titanium dioxide finished product of dispersibility.
Wherein, the key step that above-mentioned refined sulfuric acid oxygen titanium solution hydrolysis precipitation metatitanic acid is related to is as shown in Figure 1, main packet
Include following steps：
Dense titanium liquid preheating：Total titanium dioxide concentration that enrichment process obtains is in the dense titanium of about 70 DEG C of 190~220g/l temperature
Liquid into after hydrolyzing process, need to be heated to 94~96 DEG C, about 0.3 ton of ton product steam consumption according to technological requirement.
It is prepared by crystal seed：Most titanium dioxide producers use quick alkali neutralization crystal seed, and main preparation process is exactly will be preheated
Titanium liquid rapidly joins quantitative sig water, is sufficiently mixed, curing.
Hydrolysis：In hydrolyzer, dense titanium liquid, by heating, unboiled water is issued in blas under the action of plus seed
Thermal response, generation metatitanic acid precipitation (i.e. hydrolysis terminates material).
Hydrolyze slurry cooling：Hydrolysis terminates material temperature degree at 105 DEG C or so, needs that press filtration could be entered after cooling
Machine is once washed, and is often cooled down in industry by a large amount of recirculated water to hydrolysis material.
Primary washing：Hydrolyze the still a large amount of iron of content in the metatitanic acid terminated, it is necessary to by once washing, remove inclined titanium
Remaining a large amount of waste water in acid, while further reduce the iron residual in metatitanic acid.
Inventor think the conventional process flow the problem is that：1st, the dense titanium liquid temperature that enrichment process obtains is relatively low,
It needs to consume a large amount of steam and carries out heating and can be only achieved suitable hydrolysis temperature, therefore the energy consumption that the preheating of dense titanium liquid needs is very
It is high；2nd, the temperature of metatitanic acid precipitation obtained after hydrolyzing is very high, could enter filter press after needing cooling, it is therefore desirable to disappear
A large amount of recirculated waters are consumed to cool down material；3rd, waste of steam caused by above-mentioned 1,2 most increases the load of dirty cycle at last, increases
Power consumption.
Utility model content
To reduce the energy consumption of sulfuric acid method titanium pigment hydrolyzing process, and mitigate the load of dirty cycle, this application provides one kind
Sulfuric acid method titanium pigment hydrolysis terminates low level heat recovery method and recovery system in material.
Technical solution is used by the application：Sulfuric acid method titanium pigment hydrolysis terminates low level heat recovery method in material, including
Following steps：
A, pre- heating：The dense titanium liquid that enrichment process is obtained is sent into dividing wall type heat exchanger, with the hydrolysis generated in step C
Terminate material and carry out indirect heat exchange, after heat exchange, dense titanium liquid temperature raising obtains the pre- dense titanium liquid of heating；
B, dense titanium liquid preheating：The temperature for the dense titanium liquid that heats up in advance is further heated to the temperature of technique needs by steam heating
Degree, and crystal seed preparation is completed, obtain hydrolysis material titanium liquid；
C, it hydrolyzes：Hydrolysis material titanium liquid addition hydrolyzer is hydrolyzed, hydrolysis is obtained and terminates material；
D, pre- cooling：It will hydrolyze and terminate material and be sent into the dividing wall type heat exchanger described in step A, it is and dense described in step A
Titanium liquid carries out indirect heat exchange, and after heat exchange, hydrolysis, which terminates material temperature degree, to be reduced, and obtains pre- cooling hydrolyzation material；
E, hydrolysis slurry cooling：Pre- cooling hydrolyzation material send primary washing work after being cooled further to the temperature of technique needs
Sequence is washed.
The application needs to heat up before entering hydrolyzing process with reference to dense titanium liquid, and hydrolysis terminates to expect to need before into primary washing pre-
The characteristics of hot, it is rational propose more than new technological process：
Hydrolysis terminates material and carries out heat exchange processing, extra heat is removed, to reduce the load of cooling process；Hydrolyze material
Temperature-reducing medium using waiting to preheat dense titanium liquid, by the way of indirect heat exchange, control rational heat exchange area, can to treat pre-
The temperature difference that hot dense titanium liquid and hydrolysis terminate material is less than 5 DEG C or even identical.Which not only reduces the steaming of dense titanium liquid preheating procedure
Vapour consumes, while can effectively reduce the needs that hydrolysis terminates fresh cooling water in material cooling procedure, has what is killed two birds with one stone
Purpose, simultaneously because the reduction of System steam consumption is corresponding so that two processing costs for washing steam reduce.Using the new of this programme
After technique, production ton titanium dioxide can reduce about 0.20 ton of steam consumption, save about 10 side of fresh water.
Heat transfer process should carry out in dividing wall type heat exchanger, and the dividing wall type heat exchanger refers to the stream of two kinds of different temperatures
Flowed in the space that body is separated by fixed wall surface (be known as heat-transfer area), by the heat conduction in wall face and the heat convection of wall surface into
The transmission of row heat.Participating in the fluid of heat exchange will not mix, and transmittance process is continuous and steadily carries out.The biography of dividing wall type heat exchanger
Hot face is mostly using the good metal manufacture of heat conductivility.In certain occasions since corrosion-resistant needs, also useful nonmetallic (such as stone
Ink, poly- four ethylene etc.) manufacture.Cold and hot fluid is separated by a solid wall surface is conducted heat by wall face.According to the shape of heat-transfer area
Shape and design feature, dividing wall type heat exchanger can be divided into：(1) pipe heat exchanger：As double pipe heat exchanger, spiral tube heat exchanger,
Shell-and-tube heat exchanger, heat-pipe heat exchanger, economizer etc..(2) plate face formula heat exchanger：As plate heat exchanger, spiral plate type exchange heat
Device, lamella heat exchanger etc..(3) extended surface formula heat exchanger：Such as plate-fin heat exchanger, fin-tube type heat exchanger, the heat transfer strengthened
Pipe etc..
The utility model additionally provides a kind of sulfuric acid method titanium pigment hydrolysis and terminates low level heat recovery system in material, is included in liquid
The dense titanium liquid storage tank 1 being sequentially connected in phase path, preheater 2, hydrolyzer 3, cooler 4, one washes filter press 5；It is characterized in that：
Dividing wall type heat exchanger is further included, the dividing wall type heat exchanger is equipped with the first heat exchange chamber and the second heat exchanging chamber being separated by by heat-transfer area
Room, first heat exchange chamber are connected on the process pipe between dense titanium liquid storage tank 1 and preheater 2, second heat exchanging chamber
Room is connected on the process pipe between hydrolyzer 3 and cooler 4.
The system matches with the above method, convenient for the implementation of method.
" being sequentially connected on liquid phase path " described in the utility model refers to each equipment along titanium liquid in systems
Flow path is linked in sequence.Such as be sequentially connected each equipment by process pipe, in technique, titanium liquid is in each equipment and pipeline
Flowing forms liquid phase path, so as to fulfill each equipment " being sequentially connected on liquid phase path ".
The beneficial effects of the utility model are：1) production ton titanium dioxide can reduce about 0.20 ton of steam consumption, save fresh
About 10 side of water；2) since the reduction of System steam consumption is corresponding so that two processing costs for washing steam reduce；3) scheme is easy to real
It applies, conducive to industrially promoting.
Description of the drawings
Fig. 1 is the Flow of Goods and Materials precedence diagram of sulfuric acid method titanium pigment titanyl sulfate solution hydrolyzing process.
Fig. 2 is the process flow chart of embodiment.
Fig. 3 is the equipment flowsheet of the utility model.
In figure label for：The dense titanium liquid storage tanks of 1-, 2- preheaters, 3- hydrolyzers, 4- coolers, 5- mono- wash filter press, 6- plates
Formula heat exchanger, the first heat exchange chambers of 61-, the second heat exchange chambers of 62-.
Specific embodiment
The utility model is further illustrated with reference to the accompanying drawings and examples.
As shown in Figure 2 and Figure 3, the sulfuric acid method titanium pigment hydrolysis of the utility model terminates low level heat recovery system in material, including
The dense titanium liquid storage tank 1 being sequentially connected on liquid phase path, preheater 2, hydrolyzer 3, cooler 4, one washes filter press 5, board-like to change
Hot device 6, the plate heat exchanger 6 are equipped with the first heat exchange chamber 61 and the second heat exchange chamber 62 that are separated by by heat-transfer area, and described the
One heat exchange chamber 61 is connected on the process pipe between dense titanium liquid storage tank 1 and preheater 2, and second heat exchange chamber 62 connects
On process pipe between hydrolyzer 3 and cooler 4.
Embodiment one：
During work, the dense titanium liquid in dense titanium liquid storage tank 1 by being pumped into the first heat exchange chamber 61 of plate heat exchanger 6,
It is 72 DEG C that the temperature of dense titanium liquid is measured before into heat exchange chamber, then dense titanium liquid in the first heat exchange chamber 61 with the second heat exchanging chamber
The hydrolysis generated by preamble technique in room 62 terminates to expect that (105 DEG C) exchange heat, and titanium liquid is changed from first after heat exchange
The hot outflow of chamber 61 obtains the pre- dense titanium liquid of heating, and the temperature for measuring the pre- dense titanium liquid of heating at this time is 87 DEG C.Then it will heat up in advance dense
Titanium liquid is sent into preheater 2, and 95 DEG C are further increased to, and will be pre- by the steam-heated mode dense titanium liquid temperature that will heat up in advance
The good titanium liquid of heat rapidly joins quantitative sig water, is sufficiently mixed, and cures, obtains hydrolysis material titanium liquid.By hydrolysis material titanium liquid
It adds in hydrolyzer 3 to be hydrolyzed, obtains hydrolysis and terminate material.Then hydrolysis is terminated into (105 DEG C) feeding plate heat exchangers 6 second of material
In heat exchange chamber 62, in the second heat exchange chamber 62, hydrolysis terminates material and continues the first heat exchanging chamber of entrance generated with subsequent technique
The dense titanium liquid (72 DEG C) of room 61 exchanges heat, and titanium liquid obtains pre- cooling hydrolysis from the outflow of the second heat exchange chamber 62 after heat exchange
Material, the temperature for measuring pre- cooling hydrolyzation material at this time is 90 DEG C.Then cooling hydrolyzation material is sent into cooler 4 in advance, cold by recycling
But pre- cooling hydrolysis material temperature degree is further reduced to 70 DEG C by water, is then fed into one and is washed in filter press 5 and is washed.
By this programme continuous production one month, the energy consumption of titanyl sulfate solution hydrolyzing process is counted, the results are shown in Table
1。
Embodiment two：
During work, the dense titanium liquid in dense titanium liquid storage tank 1 by being pumped into the first heat exchange chamber 61 of plate heat exchanger 6,
It is 70 DEG C that the temperature of dense titanium liquid is measured before into heat exchange chamber, then dense titanium liquid in the first heat exchange chamber 61 with the second heat exchanging chamber
The hydrolysis generated by preamble technique in room 62 terminates to expect that (105 DEG C) exchange heat, it is ensured that dense titanium liquid and hydrolysis terminate material
Flow velocity it is equal, control inlet amount, titanium liquid obtains the dense titanium liquid of pre- heating from the outflow of the first heat exchange chamber 61 after heat exchange, at this time
The temperature for measuring the pre- dense titanium liquid of heating is 85 DEG C.Then the dense titanium liquid that will heat up in advance is sent into preheater 2, passes through steam-heated side
The formula dense titanium liquid temperature that will heat up in advance is further increased to 96 DEG C, and preheated titanium liquid is rapidly joined quantitative sig water, fills
Divide mixing, curing obtains hydrolysis material titanium liquid.Hydrolysis material titanium liquid addition hydrolyzer 3 is hydrolyzed, hydrolysis is obtained and terminates
Material.Hydrolysis is terminated (105 DEG C) of material again to be sent into 6 second heat exchange chamber 62 of plate heat exchanger, in the second heat exchange chamber 62, water
The dense titanium liquid (70 DEG C) that beam material of unhitching continues the first heat exchange chamber of entrance 61 generated with subsequent technique exchanges heat, it is ensured that hydrolysis
It is equal with the flow velocity of dense titanium liquid to terminate material, controls inlet amount, titanium liquid obtains pre- from the outflow of the second heat exchange chamber 62 after heat exchange
Cool down hydrolyzation material, and the temperature for measuring pre- cooling hydrolyzation material at this time is 85 DEG C.Then cooling hydrolyzation material is sent into cooler 4 in advance, is led to
It crosses recirculated cooling water and pre- cooling hydrolysis material temperature degree is further reduced to 70 DEG C, be then fed into one and wash in filter press 5 and washed.
By this programme continuous production one month, the energy consumption of titanyl sulfate solution hydrolyzing process is counted, the results are shown in Table 1.
Table 1：Energy consumption statistic table
Claims (2)
1. sulfuric acid method titanium pigment hydrolysis terminates low level heat recovery system in material, it is included in the dense titanium liquid being sequentially connected on liquid phase path
Storage tank (1), preheater (2), hydrolyzer (3), cooler (4), one washes filter press (5)；It is characterized in that：Dividing wall type is further included to change
Hot device, the dividing wall type heat exchanger are equipped with the first heat exchange chamber and the second heat exchange chamber being separated by by heat-transfer area, and described first changes
Hot chamber is connected on the process pipe between dense titanium liquid storage tank (1) and preheater (2), and second heat exchange chamber is connected to water
It solves on the process pipe between pot (3) and cooler (4).
2. sulfuric acid method titanium pigment hydrolysis according to claim 1 terminates low level heat recovery system in material, it is characterised in that：Institute
Dividing wall type heat exchanger is stated as one kind in plate heat exchanger (6), double pipe heat exchanger, economizer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721609060.9U CN207581377U (en) | 2017-11-28 | 2017-11-28 | Sulfuric acid method titanium pigment hydrolysis terminates low level heat recovery system in material |
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| CN201721609060.9U CN207581377U (en) | 2017-11-28 | 2017-11-28 | Sulfuric acid method titanium pigment hydrolysis terminates low level heat recovery system in material |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107758736A (en) * | 2017-11-28 | 2018-03-06 | 钦州学院 | Sulfuric acid method titanium pigment hydrolysis terminates low level heat recovery method and recovery system in material |
| CN109502642A (en) * | 2019-01-18 | 2019-03-22 | 广西雅照钛白有限公司 | A kind of sulfate process titanium dioxide production process titanium liquid pre-heating energy-saving method and device |
| CN113144644A (en) * | 2021-04-02 | 2021-07-23 | 广西顺风钛业有限公司 | Titanium dioxide concentration process |
-
2017
- 2017-11-28 CN CN201721609060.9U patent/CN207581377U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107758736A (en) * | 2017-11-28 | 2018-03-06 | 钦州学院 | Sulfuric acid method titanium pigment hydrolysis terminates low level heat recovery method and recovery system in material |
| CN107758736B (en) * | 2017-11-28 | 2023-08-18 | 北部湾大学 | Method and system for recovering medium-low heat in sulfuric acid process titanium dioxide hydrolysis end material |
| CN109502642A (en) * | 2019-01-18 | 2019-03-22 | 广西雅照钛白有限公司 | A kind of sulfate process titanium dioxide production process titanium liquid pre-heating energy-saving method and device |
| CN113144644A (en) * | 2021-04-02 | 2021-07-23 | 广西顺风钛业有限公司 | Titanium dioxide concentration process |
| CN113144644B (en) * | 2021-04-02 | 2022-08-02 | 广西顺风钛业有限公司 | Titanium dioxide concentration process |
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Address after: 535011 12 Binhai Road, Binhai New Town, Qinzhou City, the Guangxi Zhuang Autonomous Region Patentee after: BEIBU GULF University Address before: No.12 Binhai Avenue, Qinzhou City, Guangxi Zhuang Autonomous Region Patentee before: Beibu Gulf University |
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Effective date of registration: 20201223 Address after: 629300 middle section of Shengma Avenue, Industrial Development Zone, Daying County, Suining City, Sichuan Province Patentee after: SICHUAN KEERRUI ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Address before: 535011 12 Binhai Road, Binhai New Town, Qinzhou City, the Guangxi Zhuang Autonomous Region Patentee before: BEIBU GULF University |