CN108793237A - A kind of processing system and method for high temperature titanium tetrachloride dusty gas - Google Patents
A kind of processing system and method for high temperature titanium tetrachloride dusty gas Download PDFInfo
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- CN108793237A CN108793237A CN201810805144.2A CN201810805144A CN108793237A CN 108793237 A CN108793237 A CN 108793237A CN 201810805144 A CN201810805144 A CN 201810805144A CN 108793237 A CN108793237 A CN 108793237A
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- Prior art keywords
- eluting column
- crude titanic
- liquid
- titanic chloride
- titanium tetrachloride
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/02—Halides of titanium
- C01G23/022—Titanium tetrachloride
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0022—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for chemical reactors
Abstract
The present invention is specially a kind of processing system and method for high temperature titanium tetrachloride dusty gas.The system comprises chlorination furnace, rotary kiln, cooling kiln, eluting column, eluting column collecting tank, centrifuge, crude titanic chloride preheater, eluting column II, Heat Exchanger in Circulating Water System I, Heat Exchanger in Circulating Water System II, freezing liquid heat exchanger, crude titanic chloride medial launders；The processing method of high temperature titanium tetrachloride dusty gas includes：Wet slag bakes and banks up with earth process, condensation pulping process, solid-liquid separation process, charging heat exchange process, a cooling working procedure, two cooling working procedures.The present invention saves existing Quench and gas solid separation process, and it is provided with wet chloride slag and bakes and banks up with earth process, condensation pulping process and solid-liquid separation process, improve the rate of recovery of 1% or so titanium tetrachloride, it feeds simultaneously in heat exchange process, 110 DEG C~119 DEG C crude titanic chloride can be heated to go refining step, economic effect apparent after set temperature with less steam.
Description
Technical field
The present invention relates to the technical field of titanium tetrachloride production and chloride process titanium dioxide production, specially a kind of four chlorinations of high temperature
The processing system and method for titanium dusty gas.
Background technology
Titanium tetrachloride produces main workshop section：Dispensing → chlorination → refined, and the main workshop section of chloride process titanium dioxide production is：
Dispensing → chlorination → refined → oxidation → post-processing, therefore in titanium tetrachloride production is produced with chloride process titanium dioxide, chlorination workshop section
It being crucial, chlorination workshop section includes reaction process, separation process, once condenses collecting process and time condensation collecting process,
And in reaction process from chlorination furnace come out chloridating gas, that is, high temperature titanium tetrachloride dusty gas mainly contain titanium tetrachloride,
CO2、CO、N2, the gas componants such as HCl, in addition also entrainment of metal chloride and unreacted petroleum coke, miberal powder, temperature in gas
It it is 600~1000 DEG C, pressure is in 100kPa (gauge pressure) left and right.
Currently, both at home and abroad to the processing of high temperature titanium tetrachloride dusty gas there are mainly two types of method, a kind of method is will be high
The cooling of warm titanium tetrachloride dusty gas Quench specially high temperature titanium tetrachloride dusty gas and comes thick the four of autocondensation collecting process
Titanium chloride, the vanadium slag mud from refining step carry out spray contact in the direct-connected quenching column of chlorination furnace or Quench conduit, will
High temperature dust titanium tetrachloride gases are cooled to 200 DEG C or so, and subsequently into dust chamber, gas solid separation is carried out in dust chamber, will
Dust in titanium tetrachloride gases after cooling, including metal chloride and unreacted petroleum coke, miberal powder, are deposited to dust chamber bottom
Portion is periodically discharged by closed ash bucket.Titanium tetrachloride gases after cooling and dedusting enter primary condensation above dust chamber and collect
Process and time condensation collecting process collect titanium tetrachloride condensation, remaining fixed gas and trace titanium tetrachloride gases into
Enter exhaust system processing.Another method is by the high temperature titanium tetrachloride dusty gas out of chlorination furnace out, includes chlorination
The metal chlorides such as iron, copper chloride, manganese chloride drop to the solidification point of these substances or less and become solid-state after above-mentioned Quench,
Subsequently into cyclone separator, gas solid separation work is completed in cyclone separator, solid matter passes through star-like from whirlwind bottom
Valve enters hydrolysis pulping tank i.e. slag ladle, is then pumped by slurries hydrolysis slurry sending out battery limit (BL) processing, from cyclone separator top
Titanium tetrachloride gases out enter primary condensation collecting process and time condensation collecting process, the principle of this method and first
Kind method is essentially identical, only makes the dust chamber of separation process into cyclone separator.
Above-mentioned first method is applied in fused salt chlorimation method Producing Titanium Dioxide.In place of Shortcomings：1, it relies solely on
Gravitational settling detaches the particle in gas, so flow cross-sectional needs sufficiently large, can just air-flow velocity be made to lower, otherwise
Particle will be taken to downstream process by air-flow, and tolerance is bigger, and cross section is bigger, i.e., equipment is bigger.Cause dust chamber bulky
It is difficult to adapt to the production of large-scale titanium tetrachloride；2, because dust is by gravitational settling, air-flow is from dust chamber import to gathering dust
Room exit velocity is slow, and air-flow is long by the time of equipment, causes dust chamber out temperature control lag, excessively sprays thick tetrachloro
Change titanium and be then susceptible to " having loose bowels " phenomenon, i.e., occurring liquid titanium tetrachloride and mix dust in dust chamber becomes thin mud；3, it opens
Since the shell of dust chamber is the easy heat conduction of normal temperature metal when vehicle, temperature is low, and the dew point of high temperature titanium tetrachloride gases is 137 DEG C,
So encountering relatively cold metal equipment inner wall is susceptible to condensation, inner wall forms one layer of titanium tetrachloride liquid film, the liquid
Film forms slurry or is baked into the larger sheet of similar " crispy rice " and consolidate with metal chloride mix dust in gas rapidly
Body is bonded on equipment inner wall, these large stretch of solids are irregularly fallen, and dust chamber or rotoclone collector bottom discharge mouth are blocked,
Cause production disruption.In addition the quenching column direct-connected with chlorination furnace or Quench conduit also can fouling it is serious, need cleaning of frequently stopping.
Second method is applied in fluidizing chlorination method Producing Titanium Dioxide.Opposite first method, is also susceptible to when driving and " draws
It is dilute " phenomenon, because containing gas phase titanium tetrachloride and gas phase metal chloride in dusty gas, after being contacted with rotoclone collector cold wall,
Both dew point and solidification point are dropped to hereinafter, there is liquid and solid, blocks whirlwind outlet at bottom, causes discharge unsmooth.Separately
When reducing produce load under outer abnormal condition or by a relatively large margin, analyzed according to centrifugal force formula, F=mu2/r, u is section
The average gas velocity of product, load reduction, air-flow become smaller, and flow velocity also just becomes smaller, and separating effect reduces after centrifugal force becomes smaller, cyclone separator
Gas-solid disngaging efficiency can substantially reduce, and lead to the fouling of subsequent condensation system equipment and blocking, increase the frequency of equipment cleaning.?
In above two method, the high-temperature dusty gas come out from chlorination furnace eventually becomes room temperature solid, liquid and fixed gas, these heat
Amount is all taken away by recirculated water, and crude titanic chloride refining step, then needs extra steam to provide heat, do not contained using high temperature
The heat of dust and gas body, in terms of energy-saving for it is unreasonable.
Invention content
For the problems in background technology, the present invention provides processing system and the side of a kind of high temperature titanium tetrachloride dusty gas
Method, improves the rate of recovery of chlorination workshop section titanium tetrachloride, while equipment will not be caused to block；In addition make full use of internal system hot
Amount, accomplishes energy-saving.
A kind of high temperature titanium tetrachloride dusty gas processing system,
The system comprises chlorination furnace 1, rotary kiln 2, cooling kiln 3, eluting column I 4, eluting column II 9 and eluting column III 13, tools
There is the eluting column collecting tank I 5 of rabbling mechanism, eluting column collecting tank II 10, eluting column collecting tank III 14, centrifuge 6, storage tank 7, thick
In Titanium tetrachloride preheater 8, Heat Exchanger in Circulating Water System I 12, Heat Exchanger in Circulating Water System II 11, freezing liquid heat exchanger 15 and crude titanic chloride
Between slot 16；
The rotary kiln 2 includes the inner cylinder of kiln body and tungsten carbide material；The kiln body is obliquely installed with horizontal plane, described time
The kiln tail of rotary kiln 2 tilts upward, and the kiln hood of the rotary kiln 2 is diagonally downward；The inner cylinder activity cooperation is set in kiln body, described
Heat tape is provided on inner tank theca；
The lower section of the inner cylinder adjacent with kiln hood is equipped with solid-phase outlet, the top of inner cylinder is equipped with gas phase import；It is adjacent with kiln tail
Inner cylinder below be equipped with gaseous phase outlet, inner cylinder top be equipped with solid phase import, the solid phase import be screw feed en-trance；
The top of the chlorination furnace 1 is equipped with outlet, and the gas phase import of rotary kiln 2, the rotary kiln 2 are connected to by pipeline
Solid phase import the solid-phase outlet of centrifuge 6 is connected to by pipeline；The liquid-phase outlet of the centrifuge 6 is connected to by pipeline
The import of storage tank 7, the outlet conduit of the storage tank 7 are connected to the import of crude titanic chloride preheater 8；
The eluting column I 4, eluting column II 9 are identical with III 13 structure of eluting column, and being provided with gas phase at the top of each eluting column goes out
Mouthful, a upper lateral part of the eluting column adjacent with gaseous phase outlet is provided with import；It is internally provided with nozzle, and nozzle is located at import
Top；Each elution tower bottom is provided with liquid-phase outlet；
The liquid-phase outlet pipeline of the eluting column I 4 is connected to the import of eluting column collecting tank I 5；The eluting column II 9
Liquid-phase outlet pipeline is connected to the import of eluting column collecting tank II 10；The liquid-phase outlet pipeline of the eluting column III 13 is connected to leaching
Wash the import of tower collecting tank III 14；
The discharge port of the crude titanic chloride preheater 8 is divided into two-way by three-way pipe, all the way with the eluting column I 4
Pipe-line is connected to, and another way is connected to the feed inlet pipeline of the Heat Exchanger in Circulating Water System I 12；The nozzle of the eluting column II 9
It is connected to the discharge opening pipeline of Heat Exchanger in Circulating Water System II 11；The discharging of the nozzle and freezing liquid heat exchanger 15 of the eluting column III 13
Mouth pipeline connection；
The gaseous phase outlet of the eluting column I 4 is connected to the inlet pipeline of eluting column II 9；The gas phase of the eluting column II 9 goes out
Mouth is connected to the inlet pipeline of eluting column III 13；The gaseous phase outlet of the eluting column III 13 is connected to tail gas by 17 pipeline of wind turbine
Washing facility 18；I 4 import of the eluting column is connected to the gaseous phase outlet pipeline of the rotary kiln 2, the solid-phase outlet of rotary kiln 2
It is connected to the inlet pipeline of cooling kiln 3；
The outlet of the eluting column collecting tank I 5 is connected to the inlet pipeline of centrifuge 6；The eluting column collecting tank II 10
Outlet two-way is divided by three-way pipe, be connected to all the way with the feed inlet pipeline of Heat Exchanger in Circulating Water System I 12, another way and recirculated water
The feed inlet pipeline of heat exchanger II 11 is connected to, discharge port and the crude titanic chloride medial launder 16 of the Heat Exchanger in Circulating Water System I 12
Inlet communication；The outlet of the eluting column collecting tank III 14 is connected to the feed inlet of freezing liquid heat exchanger 15 by pipeline；Work
When, high temperature titanium tetrachloride dusty gas is passed through rotary kiln 2 out of chlorination furnace 1, is changed with wet chloride slag counter current contacting in rotary kiln 2
Heat, the titanium tetrachloride in wet chloride slag are vaporized into dusty gas；Wet chloride slag temperature increases and is admitted to cooling kiln 3,
Send processing outside after cooling；The temperature of dusty gas reduces, and is reduced to 400 DEG C~600 DEG C；
Dusty gas distinguishes scrubbed tower I 4, eluting column II 9 and eluting column III 13 and the lower crude titanic chloride of temperature
Liquid spray contact, the titanium tetrachloride gases of dusty gas, solid dust are collected, finally from the gas phase of eluting column III 13
The on-condensible gas temperature of outlet discharge is -18 DEG C~-5 DEG C, and on-condensible gas includes the tetrachloro of carbon dioxide gas, nitrogen and trace
Change titanium；
The leacheate of eluting column I 4 flows into eluting column collecting tank I 5, and the leacheate of eluting column II 9 flows into eluting column collecting tank
II 10, the leacheate of eluting column III 13 flows into eluting column collecting tank III 14；
Wherein, the elution slurries in eluting column collecting tank I 5 are sent into centrifuge 6, while autofining in future process by stirring
Material vanadium mud be also passed into centrifuge 6, wet chloride slag and crude titanic chloride liquid are obtained after being centrifuged, wet chloride slag is passed through
In rotary kiln 2；Crude titanic chloride liquid is passed through crude titanic chloride preheater 8 after the buffering of storage tank 7, preheats the room temperature that need to be refined
Titanium tetrachloride；
The crude titanic chloride liquid IV that eluting column collecting tank II 10 is collected into enters thick after the cooling of Heat Exchanger in Circulating Water System I 12
Titanium tetrachloride medial launder 16；VI overflow of crude titanic chloride liquid that eluting column collecting tank III 14 is collected into enters in crude titanic chloride
Between slot 16, when crude titanic chloride medial launder 16 reach setting liquid level send processing outside again.
Further, the chlorination furnace 1 is one kind in boiling chloridizing furnace or Molten salt chlorination furnace；The crude titanic chloride is pre-
Hot device 8 is spiral heat exchanger；
Further, when the rotary kiln 2 needs cleaning, the inner cylinder is detached out of kiln body.
Further, the angle of inclination of 2 kiln body of the rotary kiln is 2 °~4 °.
Further, heat tape is provided on the inner tank theca of the rotary kiln 2, the preheating temperature of inner cylinder is 140 DEG C
~170 DEG C.To achieve the above object, it the invention also includes a kind of high temperature titanium tetrachloride dusty gas processing method, specifically includes
Following steps：
Step (1) wet slag bakes and banks up with earth process
The high temperature titanium tetrachloride dusty gas generated in chlorination furnace 1 is introduced directly into rotary kiln 2, it is wet in rotary kiln 2
Chloride slag exchanges heat with high temperature titanium tetrachloride dusty gas counter current contacting, and the titanium tetrachloride in wet chloride slag is vaporized into primary air
Ⅰ；The kiln body rotating speed of the rotary kiln 2 is 2r/min~10r/min, the operating temperature of 2 inner cylinder of the rotary kiln is 200 DEG C~
1000℃；
The high temperature titanium tetrachloride dusty gas include titanium tetrachloride, metal chloride, unreacted miberal powder, petroleum coke,
CO2、N2, temperature is 600 DEG C~1000 DEG C；The wet chloride slag is the obtained wet chloride slag of solid-liquid separation process, temperature is 90 DEG C
~120 DEG C；
Obtain high-temperature chlorine slugging and primary air I；The high-temp chlorination cinder ladle includes metal chloride, unreacted miberal powder, stone
Oil coke, vanadium slag, temperature are 400 DEG C~600 DEG C；The primary air I include titanium tetrachloride, metal chloride, unreacted miberal powder,
Petroleum coke, CO2、N2, temperature is 400 DEG C~600 DEG C；
Step (2) condenses pulping process
The primary air I is introduced into eluting column I 4, is contacted with the spray of crude titanic chloride liquid I；65% in primary air I~
75% titanium tetrachloride gases are collected by crude titanic chloride liquid I, obtain primary air II and solidliquid mixture；
The solidliquid mixture enters eluting column collecting tank I 5, and the solidliquid mixture includes titanium tetrachloride, metal oxidation
Object, unreacted miberal powder, petroleum coke, 90 DEG C~120 DEG C of temperature；
The primary air II includes CO2、N2With part titanium tetrachloride, temperature is 150 DEG C~200 DEG C；
Step (3) solid-liquid separation process
The solidliquid mixture is separated by solid-liquid separation together with the vanadium slag mud from refining step by centrifuge 6；
Obtain wet chloride slag and crude titanic chloride liquid；
The wet chloride slag enters wet slag and bakes and banks up with earth process, and the wet chloride slag includes metal oxide, unreacted miberal powder
With petroleum coke and vanadium slag, temperature is 90 DEG C~120 DEG C；The crude titanic chloride liquid temperature is 90 DEG C~120 DEG C；
Step (4) charging heat exchange process
By the crude titanic chloride liquid and the room temperature crude titanic chloride liquid that need to be refined, in crude titanic chloride preheater
Heat exchange cooling is carried out in 8；Obtained crude titanic chloride liquid I, temperature are 60 DEG C~100 DEG C；The crude titanic chloride liquid I 1
Part goes eluting column I 4, another part to remove Heat Exchanger in Circulating Water System I 12；The crude titanic chloride liquid that obtained needs refine, temperature
It is 110 DEG C~119 DEG C；The crude titanic chloride that need to be refined removes refining step after need to further being heated with steam；
(5) one cooling working procedure of step
Step (2) primary air II is introduced into eluting column II 9, is contacted with the spray of crude titanic chloride liquid III, primary air
95%~99% titanium tetrachloride gases are collected by the condensation of crude titanic chloride liquid III in II；Obtain mainstream gas III with it is thick
Titanium tetrachloride liquid IV；IV temperature of crude titanic chloride liquid is 40 DEG C~55 DEG C；The mainstream gas III includes CO2、N2With
A small amount of titanium tetrachloride, temperature are 40 DEG C~55 DEG C；
A part of IV flow control valve through eluting column collecting tank II 10 of the crude titanic chloride liquid, pressurization are continuously introduced into
Heat Exchanger in Circulating Water System II 11 obtains the crude titanic chloride liquid III of room temperature through the heat exchange cooling of Heat Exchanger in Circulating Water System II 11；Another portion
Divide the crude titanic chloride liquid IV to be sent into Heat Exchanger in Circulating Water System I 12 to cool down；
(6) two cooling working procedure of step
The mainstream gas III is introduced into eluting column III 13, is contacted with the spray of crude titanic chloride liquid V, in primary air III
95%~99% titanium tetrachloride gases are collected by the condensation of crude titanic chloride liquid V；Obtain on-condensible gas and thick four chlorination
Titanium liquid VI；
The crude titanic chloride liquid IV enters eluting column collecting tank III 14, and VI temperature of crude titanic chloride liquid is-
10 DEG C~-5 DEG C；The on-condensible gas includes CO2、N2With trace titanium tetrachloride, temperature is -10 DEG C~-5 DEG C；
A part of crude titanic chloride liquid VI is continuously introduced into cold through III 14 flow control valve of eluting column collecting tank, pressurization
Freeze liquid heat exchanger 15, obtains crude titanic chloride liquid V through heat exchange cooling, V temperature of crude titanic chloride liquid is less than -20 DEG C
~-15 DEG C；Another part crude titanic chloride liquid VI enters thick four chlorination by the overflow port overflow of eluting column collecting tank III 14
Titanium medial launder 16, is stored；
The on-condensible gas removes washing tail gas；
Crude titanic chloride liquid IV in the Heat Exchanger in Circulating Water System I 12 and crude titanic chloride liquid I obtain often through heat exchange
The room temperature crude titanic chloride liquid VII is passed through crude titanic chloride medial launder 16 by warm crude titanic chloride liquid VII, and described thick four
Titanium chloride medial launder 16 reaches setting liquid level and sends processing outside.
Further, the crude titanic chloride liquid obtained in step (3) is first passed through the caching of storage tank 7, then is passed through by storage tank 7
In crude titanic chloride preheater 8.
Further, the high-temperature chlorine slugging that step (1) obtains cooling kiln 3 is passed through to cool down；Low temperature chlorination slag is obtained, by institute
It states low temperature chlorination slag and sends processing outside；The low temperature chlorination cinder ladle includes metal chloride, unreacted miberal powder, petroleum coke, vanadium slag, temperature
Degree is 40 DEG C~50 DEG C.
Beneficial effects of the present invention include：
1, the present invention replaces dirt pocket in the prior art and cyclone separator using rotary kiln, and rotary kiln includes electrical heating
Inner cylinder so that the temperature of inner cylinder controls more than titanium tetrachloride dew-point temperature, eliminates equipment cold wall, to avoid close to equipment
High-temperature gas at inner wall is cooled down by cold wall and forms titanium tetrachloride liquid film, titanium tetrachloride liquid film metal chloride mix dust shape
Pulp object or the larger chip solid for being baked into similar " crispy rice " get lodged in dust chamber or rotoclone collector bottom discharge mouth, block up
Fill in equipment；Reaction time is adjusted by controlling the kiln body rotating speed of rotary kiln, it is ensured that chloride slag is thoroughly dried, without fused salt
Tall and big dust chamber in chloridising, equipment and workshop construction investment are relatively saved；The kiln body of rotary kiln is rotation, and chlorination is wet
Slag will not be bonded in equipment inner wall with formation solid after high temperature titanium tetrachloride dusty gas counter current contacting, and rotary kiln is revolved with solid
When going to eminence, using gravity, solid is fallen down.
2, the present invention substitutes the static device used in existing procedure using dynamic device system (rotary kiln, centrifuge)
System (chilling tower, dust chamber, rotoclone collector) avoids slurry from toasting formation in static device compared with slab-like solids bar
For knot in equipment inner wall, these chip solid objects, which are once fallen, is easy to block the smaller discharge port in static equipment bottom.Even if chilling tower
It inside scabs and does not fall off, also result in equipment internal diameter and become smaller, to make air velocity become larger, cooling-down effect is not achieved.And in rotary kiln
The relatively small chloride slag of middle water capacity (titanium tetrachloride), which will not be formed, to scab, and by the rotation of rotary kiln, loose is Blocky chlorinated
Slag is constantly fallen by upthrow, is become larger solid particle before kiln hood and is fallen into cooling kiln.In solid-liquid separation process use from
Chloride slag is more thoroughly isolated in scheming, and unlike dust chamber or rotoclone collector are when changing produce load, separative efficiency, which reduces, (to be received
Dirt room increasing productivity and rotoclone collector load reduction are to will appear separative efficiency reduction) and cause to enter subsequent condensation system
Metal chloride dust increases, so as to cause condensing plant accumulates mud and blocks.
3, the present invention saves existing Quench and gas solid separation process, and is provided with wet chloride slag and bakes and banks up with earth process, condensation
Pulping process and solid-liquid separation process, the crude titanic chloride in wet chloride slag bakes and banks up with earth process in wet chloride slag are added by high-temperature gas
Thermosetting gas enters condensation pulping process together with primary air, and chloride slag is larger solid particle, rather than previous gas-solid point
From the smaller dust particles in process, the titanium tetrachloride gases carried secretly in chloride slag bulky grain are than the tetrachloro that dust little particle is carried secretly
Change titanium gas much less, so improving the rate of recovery of 1% or so titanium tetrachloride.
4, since chlorination reaction is exothermic reaction, outlet temperature is very high, and waste heat is big, and crude titanic chloride refining step needs
It wants heat, the present invention to exchange heat in charging in process, utilizes the thick of 90 DEG C~120 DEG C higher temperatures come out in solid-liquid separation process
Titanium tetrachloride preheats the room temperature crude titanic chloride that need to be refined (this process carries out in crude titanic chloride preheater), by its temperature
110 DEG C~119 DEG C are promoted to, 110 DEG C~119 DEG C crude titanic chloride can be heated to set temperature with less steam
After remove refining step.For producing 50000 tons of titanium white projects per year, 2.5~3.0 ten thousand tons of steam can be saved within 1 year, economic effect is apparent.
Description of the drawings
Fig. 1 is the process flow chart of the present invention；
Wherein：1- chlorination furnaces；2- rotary kilns；3- cools down kiln；4- eluting columns I；5- eluting columns collecting tank I；6- centrifuges；7-
Storage tank；8- crude titanic chloride preheaters；9- eluting columns II；10- eluting columns collecting tank II；11- Heat Exchanger in Circulating Water System II；12- is followed
Ring water- to-water heat exchanger I；13- eluting columns III；14- eluting columns collecting tank III；15- freezing liquid heat exchangers；Among 16- crude titanic chlorides
Slot；17- wind turbines；18- washing tail gas equipment.
Fig. 2 is the flow chart of the present invention.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are only used to explain the present invention,
It is not intended to limit the present invention.
It is as shown in Figure 1 the process flow chart of the present invention, four chlorination of high temperature of the present invention is illustrated in conjunction with specific implementation mode
Titanium dusty gas processing system, for realizing the processing of the high temperature titanium tetrachloride dusty gas of the specific embodiment of the present invention
System specifically includes：Chlorination furnace 1, rotary kiln 2, cooling kiln 3, eluting column I 4, eluting column II 9 and eluting column III 13 have stirring
The eluting column collecting tank I 5 of mechanism, eluting column collecting tank II 10, eluting column collecting tank III 14, centrifuge 6, storage tank 7, thick four chlorination
Titanium preheater 8, eluting column II 9, Heat Exchanger in Circulating Water System I 12, Heat Exchanger in Circulating Water System II 11, freezing liquid heat exchanger 15, thick four chlorination
Titanium medial launder 16；Wherein crude titanic chloride preheater 8 is spiral heat exchanger；Chlorination furnace 1 is boiling chloridizing furnace；The rotary kiln 2
Inner cylinder including kiln body and tungsten carbide material；The kiln body is obliquely installed with horizontal plane, and the kiln tail of the rotary kiln 2 is tilted towards
On, diagonally downward, angle of inclination is 2 DEG C~4 DEG C to the kiln hood of the rotary kiln 2；The inner cylinder be set to kiln body in, the inner cylinder with
Kiln body is coaxially disposed, and the inner cylinder can be detached out of kiln body；Heat tape is provided on the inner cylinder, the preheating temperature of inner cylinder is
140 DEG C~170 DEG C；Solid-phase outlet, gaseous phase outlet, solid phase import and gas phase import are provided on the inner cylinder；The solid phase goes out
Mouth is set to below kiln hood；The gaseous phase outlet is set to above kiln tail；The solid phase import is screw feed en-trance, is set to kiln tail
Top；The gas phase import is set to below kiln hood.
The chlorination furnace 1 top exit connection rotary kiln 2 gas phase import, the solid phase import of the rotary kiln 2 with from
The solid-phase outlet of scheming 6 is connected to；It is arranged between the liquid-phase outlet and the feed inlet of crude titanic chloride preheater 8 of the centrifuge 6
There is storage tank 7；The import of storage tank 7 is connected to the liquid-phase outlet of centrifuge 6, the outlet of storage tank 7 and crude titanic chloride preheater 8 into
Material mouth is connected to.
The eluting column I 4, eluting column II 9 are identical with III 13 structure of eluting column, and being provided with gas phase at the top of each eluting column goes out
Mouthful, a upper lateral part of the eluting column adjacent with gaseous phase outlet is provided with import；It is internally provided with nozzle, and nozzle is located at import
Top；Each elution tower bottom is provided with liquid-phase outlet；
The liquid-phase outlet pipeline of the eluting column I 4 is connected to the import of eluting column collecting tank I 5；The eluting column II 9
Liquid-phase outlet pipeline is connected to the import of eluting column collecting tank II 10；The liquid-phase outlet pipeline of the eluting column III 13 is connected to leaching
Wash the import of tower collecting tank III 14；
The discharge port of the crude titanic chloride preheater 8 is divided into two-way by three-way pipe, all the way with the eluting column I 4
Pipe-line is connected to, and another way is connected to the feed inlet pipeline of the Heat Exchanger in Circulating Water System I 12；The nozzle of the eluting column II 9
It is connected to the discharge opening pipeline of Heat Exchanger in Circulating Water System II 11；The discharging of the nozzle and freezing liquid heat exchanger 15 of the eluting column III 13
Mouth pipeline connection；
The gaseous phase outlet of the eluting column I 4 is connected to the inlet pipeline of eluting column II 9；The gas phase of the eluting column II 9 goes out
Mouth is connected to the inlet pipeline of eluting column III 13；The gaseous phase outlet of the eluting column III 13 is connected to tail gas by 17 pipeline of wind turbine
Washing facility 18；I 4 import of the eluting column is connected to the gaseous phase outlet pipeline of the rotary kiln 2, the solid-phase outlet of rotary kiln 2
It is connected to the inlet pipeline of cooling kiln 3；
The outlet of the eluting column collecting tank I 5 is connected to the inlet pipeline of centrifuge 6；The eluting column collecting tank II 10
Outlet two-way is divided by three-way pipe, be connected to all the way with the feed inlet pipeline of Heat Exchanger in Circulating Water System I 12, another way and recirculated water
The feed inlet pipeline of heat exchanger II 11 is connected to, discharge port and the crude titanic chloride medial launder 16 of the Heat Exchanger in Circulating Water System I 12
Inlet communication；The outlet of the eluting column collecting tank III 14 is connected to the feed inlet pipeline of freezing liquid heat exchanger 15.
The operating principle of above system is described as follows：
The case where by processing gas：600 DEG C~1000 DEG C high temperature titanium tetrachloride dusty gases, including titanium tetrachloride, metal
Chloride, unreacted miberal powder, petroleum coke, CO2、N2。
Step (1) wet slag bakes and banks up with earth process
The high temperature titanium tetrachloride dusty gas generated in chlorination furnace 1 is introduced directly into rotary kiln 2, the wet chlorine in rotary kiln 2
Slugging exchanges heat with high temperature titanium tetrachloride dusty gas counter current contacting, and the titanium tetrachloride in wet chloride slag is vaporized into primary air I；
The rotating speed of the kiln body is that 2r/min~10r/min is adjustable, adjusts the residence time by controlling kiln body rotating speed, it is ensured that chloride slag
It is thoroughly dry；The operating temperature of the kiln body inner cylinder is 200 DEG C~1000 DEG C；The wet chloride slag obtains for solid-liquid separation process
Wet chloride slag, temperature be 90 DEG C~120 DEG C；
Obtain high-temperature chlorine slugging and primary air I；The high-temp chlorination cinder ladle includes metal chloride, unreacted miberal powder, stone
Oil coke, vanadium slag, temperature is at 400 DEG C~600 DEG C；The primary air I include titanium tetrachloride, metal chloride, unreacted miberal powder,
Petroleum coke, CO2、N2, temperature is at 400 DEG C~600 DEG C；
The high-temperature chlorine slugging is passed through cooling kiln 3；Cooling obtains low temperature chlorination slag, sends the low temperature chlorination slag outside place
Reason；The low temperature chlorination cinder ladle includes metal chloride, unreacted miberal powder, petroleum coke, vanadium slag, and temperature is at 40 DEG C~50 DEG C；Step
Suddenly (2) condense pulping process
Primary air I is introduced into eluting column I 4, is contacted with the spray of crude titanic chloride liquid I；65%~75% in primary air I
Titanium tetrachloride gases collected by crude titanic chloride liquid I, obtain primary air II and solidliquid mixture；
The solidliquid mixture enters eluting column collecting tank I 5, and the solidliquid mixture includes titanium tetrachloride, metal oxidation
Object, unreacted miberal powder, petroleum coke, temperature are 90 DEG C~120 DEG C；
The primary air II includes CO2、N2With part titanium tetrachloride, temperature is at 150 DEG C~200 DEG C；
Step (3) solid-liquid separation process
The solidliquid mixture is separated by solid-liquid separation together with the vanadium slag mud from refining step by centrifuge 6；
Obtain wet chloride slag and crude titanic chloride liquid；
The wet chloride slag enters wet slag and bakes and banks up with earth process, and the wet chloride slag includes metal oxide, unreacted miberal powder
With petroleum coke and vanadium slag, temperature is 90 DEG C~120 DEG C；The crude titanic chloride liquid temperature is 90 DEG C~120 DEG C；
The crude titanic chloride liquid is first passed through the caching of storage tank 7, then is passed through in crude titanic chloride preheater 8 by storage tank 7；
Step (4) charging heat exchange process
By the crude titanic chloride liquid and the room temperature crude titanic chloride liquid that need to be refined, in crude titanic chloride preheater
It exchanges heat in 8；Exchange heat obtained crude titanic chloride liquid I, and temperature is 60 DEG C~100 DEG C；The crude titanic chloride liquid I 1
Part goes eluting column I 4, another part to remove Heat Exchanger in Circulating Water System I 2；Exchange heat the refined crude titanic chloride liquid of obtained needs, temperature
Degree is 110 DEG C~119 DEG C；The refined crude titanic chloride of the needs removes refining step after further being heated with steam.
(5) one cooling working procedure of step
The primary air II obtained in step (2) is introduced into eluting column II 9, is contacted with the spray of crude titanic chloride liquid III, it is main
97%~99% titanium tetrachloride gases are collected by the condensation of crude titanic chloride liquid III in air-flow II；Obtain mainstream gas III
With crude titanic chloride liquid IV；The crude titanic chloride liquid IV enters eluting column collecting tank II 10, the crude titanic chloride liquid
IV temperature of body is 40 DEG C~55 DEG C；The mainstream gas III includes CO2、N2With a small amount of titanium tetrachloride, temperature is 40 DEG C~55 DEG C；
For a part of crude titanic chloride liquid IV through II 10 flow control valve of eluting column collecting tank, pressurization is continuously passed through recirculated water heat exchange
Device II 11 obtains the crude titanic chloride liquid III of room temperature through heat exchange cooling；Crude titanic chloride liquid IV described in another part is sent into
Heat Exchanger in Circulating Water System I 12 cools down；
(6) two cooling working procedure of step
The mainstream gas III is introduced into eluting column III 13, is contacted with the spray of crude titanic chloride liquid V, in primary air III
97%~99% titanium tetrachloride gases are collected by the condensation of crude titanic chloride liquid V；Obtain on-condensible gas and thick four chlorination
Titanium liquid VI；
The crude titanic chloride liquid VI enters eluting column collecting tank III 14, and VI temperature of crude titanic chloride liquid is-
10 DEG C~-5 DEG C；The on-condensible gas temperature is -18 DEG C~-5 DEG C, including CO2、N2With trace titanium tetrachloride；The on-condensible gas
It is passed through washing tail gas equipment 18 through pipeline again, removes washing tail gas.
A part of crude titanic chloride liquid VI is continuously introduced into cold through III 14 flow control valve of eluting column collecting tank, pressurization
Freeze liquid heat exchanger 15, obtains crude titanic chloride liquid V through heat exchange cooling, V temperature of crude titanic chloride liquid is -20 DEG C
~-15 DEG C；Crude titanic chloride liquid VI described in another part enters thick four by the overflow port overflow of eluting column collecting tank III 14
Titanium chloride medial launder 16, is stored；
Crude titanic chloride liquid IV in the Heat Exchanger in Circulating Water System I 12 and crude titanic chloride liquid I obtain often through cooling
The room temperature crude titanic chloride liquid VII is also passed into crude titanic chloride medial launder 16 by warm crude titanic chloride liquid VII, described thick
Titanium tetrachloride medial launder 16 sends processing outside after reaching setting liquid level.
The case where gas discharges：High temperature dust titanium tetrachloride gases obtain on-condensible gas, on-condensible gas temperature after processing
For -18 DEG C~-5 DEG C, including CO2、N2With trace titanium tetrachloride etc., the mass fraction of titanium tetrachloride is 0.1% in the fixed gas
~0.4%.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, all within the spirits and principles of the present invention made by all any modification, equivalent and improvement etc., should all include
Within protection scope of the present invention.
Claims (8)
1. a kind of high temperature titanium tetrachloride dusty gas processing system, it is characterised in that：
The system comprises chlorination furnace (1), rotary kiln (2), cooling kiln (3), eluting column I (4), eluting column II (9) and eluting columns
III (13), the eluting column collecting tank I (5) with rabbling mechanism, eluting column collecting tank II (10), eluting column collecting tank III (14),
It is centrifuge (6), storage tank (7), crude titanic chloride preheater (8), Heat Exchanger in Circulating Water System I (12), Heat Exchanger in Circulating Water System II (11), cold
Freeze liquid heat exchanger (15) and crude titanic chloride medial launder (16)；
The rotary kiln (2) includes the inner cylinder of kiln body and tungsten carbide material；The kiln body is obliquely installed with horizontal plane, the revolution
The kiln tail of kiln (2) tilts upward, and the kiln hood of the rotary kiln (2) is diagonally downward；The inner cylinder activity cooperation is set in kiln body, institute
It states and is provided with heat tape on inner tank theca；
The lower section of the inner cylinder adjacent with kiln hood is equipped with solid-phase outlet, the top of inner cylinder is equipped with gas phase import；In adjacent with kiln tail
Cylinder lower section is equipped with gaseous phase outlet, the top of inner cylinder is equipped with solid phase import, and the solid phase import is screw feed en-trance；
The top of the chlorination furnace (1) is equipped with outlet, and the gas phase import of rotary kiln (2), the rotary kiln are connected to by pipeline
(2) solid phase import is connected to the solid-phase outlet of centrifuge (6) by pipeline；The liquid-phase outlet of the centrifuge (6) passes through pipe
Road is connected to the import of storage tank (7), and the outlet conduit of the storage tank (7) is connected to the import of crude titanic chloride preheater (8)；
The eluting column I (4), eluting column II (9) are identical with eluting column III (13) structure, and gas phase is provided at the top of each eluting column
Outlet, a upper lateral part of the eluting column adjacent with gaseous phase outlet are provided with import；It is internally provided with nozzle, and nozzle is located at import
Top；Each elution tower bottom is provided with liquid-phase outlet；
The liquid-phase outlet pipeline of the eluting column I (4) is connected to the import of eluting column collecting tank I (5)；The eluting column II (9)
Liquid-phase outlet pipeline be connected to the import of eluting column collecting tank II (10)；The liquid-phase outlet pipeline of the eluting column III (13) connects
Lead to the import of eluting column collecting tank III (14)；
The discharge port of the crude titanic chloride preheater (8) is divided into two-way by three-way pipe, all the way with the eluting column I (4)
Pipe-line is connected to, and another way is connected to the feed inlet pipeline of the Heat Exchanger in Circulating Water System I (12)；The eluting column II (9)
Nozzle is connected to the discharge opening pipeline of Heat Exchanger in Circulating Water System II (11)；The nozzle of the eluting column III (13) and freezing liquid heat exchanger
(15) discharge opening pipeline connection；
The gaseous phase outlet of the eluting column I (4) is connected to the inlet pipeline of eluting column II (9)；The gas phase of the eluting column II (9)
Outlet is connected to the inlet pipeline of eluting column III (13)；The gaseous phase outlet of the eluting column III (13) is connected by wind turbine (17) pipeline
Lead to washing tail gas equipment (18)；The eluting column I (4) import is connected to the gaseous phase outlet pipeline of the rotary kiln (2), revolution
The solid-phase outlet of kiln (2) is connected to the inlet pipeline of cooling kiln (3)；
The outlet of the eluting column collecting tank I (5) is connected to the inlet pipeline of centrifuge (6)；The eluting column collecting tank II
(10) outlet is divided into two-way by three-way pipe, is connected to all the way with the feed inlet pipeline of Heat Exchanger in Circulating Water System I (12), another way with
The feed inlet pipeline of Heat Exchanger in Circulating Water System II (11) is connected to, the discharge port and crude titanic chloride of the Heat Exchanger in Circulating Water System I (12)
The inlet communication of medial launder (16)；The outlet of the eluting column collecting tank III (14) is connected to freezing liquid heat exchanger by pipeline
(15) feed inlet；
When work, high temperature titanium tetrachloride dusty gas is passed through rotary kiln (2) out of chlorination furnace (1), in rotary kiln (2) with wet chlorine
Slugging counter current contacting exchanges heat, and the titanium tetrachloride in wet chloride slag is vaporized into dusty gas；Wet chloride slag temperature increases simultaneously
It is admitted to cooling kiln (3), sends processing outside after cooling；The temperature of dusty gas reduces, and is reduced to 400 DEG C~600 DEG C or less；
Dusty gas distinguishes scrubbed tower I (4), eluting column II (9) and eluting column III (13) and the lower crude titanic chloride liquid of temperature
Body spray contact, the titanium tetrachloride gases of dusty gas, solid dust are collected, finally from the gas phase of eluting column III (13)
- 18 DEG C~-5 DEG C of the on-condensible gas temperature of discharge is exported, on-condensible gas includes four chlorinations of carbon dioxide gas, nitrogen and trace
Titanium；
The leacheate of eluting column I (4) flows into eluting column collecting tank I (5), and the leacheate of eluting column II (9) flows into eluting column and collects
The leacheate of slot II (10), eluting column III (13) flows into eluting column collecting tank III (14)；
Wherein, the elution slurries in eluting column collecting tank I (5) are sent into centrifuge (6), while autofining in future process by stirring
Material vanadium mud be also passed into centrifuge (6), obtain wet chloride slag and crude titanic chloride liquid after being centrifuged, wet chloride slag is logical
Enter in rotary kiln (2)；Crude titanic chloride liquid is passed through crude titanic chloride preheater (8) after storage tank (7) buffering, and preheating needs essence
The room temperature titanium tetrachloride of system；
The crude titanic chloride liquid IV that eluting column collecting tank II (10) is collected into enters thick four after the cooling of Heat Exchanger in Circulating Water System I 12
Titanium chloride medial launder (16)；VI overflow of crude titanic chloride liquid that eluting column collecting tank III (14) is collected into enters crude titanic chloride
Medial launder (16) sends processing outside again when crude titanic chloride medial launder (16) reaches setting liquid level.
2. a kind of high temperature titanium tetrachloride dusty gas processing system according to claim 1, it is characterised in that：The chlorination furnace
(1) it is one kind in boiling chloridizing furnace or Molten salt chlorination furnace；The crude titanic chloride preheater (8) is spiral heat exchanger.
3. a kind of high temperature titanium tetrachloride dusty gas processing system according to claim 1, it is characterised in that：The rotary kiln
(2) when needing cleaning, the inner cylinder is detached out of kiln body.
4. a kind of high temperature titanium tetrachloride dusty gas processing system according to claim 1, it is characterised in that：The rotary kiln
(2) angle of inclination of kiln body is 2 °~4 °.
5. a kind of high temperature titanium tetrachloride dusty gas processing system according to claim 1, it is characterised in that：The rotary kiln
(2) heat tape is provided on inner tank theca, the preheating temperature of inner cylinder is 140 DEG C~170 DEG C.
6. a kind of processing method of high temperature titanium tetrachloride dusty gas, specifically includes following steps：
Step (1) wet slag bakes and banks up with earth process
The high temperature titanium tetrachloride dusty gas generated in chlorination furnace (1) is introduced directly into rotary kiln (2), in rotary kiln (2)
Wet chloride slag exchanges heat with high temperature titanium tetrachloride dusty gas counter current contacting, and the titanium tetrachloride in wet chloride slag is vaporized into main gas
Stream I；
The kiln body rotating speed of the rotary kiln (2) is 2r/min~10r/min, and the operating temperature of rotary kiln (2) inner cylinder is 200
DEG C~1000 DEG C；
The high temperature titanium tetrachloride dusty gas includes titanium tetrachloride, metal chloride, unreacted miberal powder, petroleum coke, CO2、
N2, temperature is 600 DEG C~1000 DEG C；The wet chloride slag be solid-liquid separation process obtain wet chloride slag, temperature 90 DEG C~120
℃；Obtain high-temperature chlorine slugging and primary air I；The high-temp chlorination cinder ladle include metal chloride, unreacted miberal powder, petroleum coke,
Vanadium slag, temperature is at 400 DEG C~600 DEG C；The primary air I includes titanium tetrachloride, metal chloride, unreacted miberal powder, oil
Burnt, CO2、N2, temperature is 400 DEG C~600 DEG C；
Step (2) condenses pulping process
The primary air I is introduced into eluting column I (4), is contacted with the spray of crude titanic chloride liquid I；65%~75% in primary air I
Titanium tetrachloride gases collected by crude titanic chloride liquid I, obtain primary air II and solidliquid mixture；
The solidliquid mixture enters eluting column collecting tank I (5), the solidliquid mixture include titanium tetrachloride, metal oxide,
Unreacted miberal powder, petroleum coke, temperature are 90 DEG C~120 DEG C；
The primary air II includes CO2、N2With part titanium tetrachloride, temperature is 150 DEG C~200 DEG C；
Step (3) solid-liquid separation process
The solidliquid mixture is separated by solid-liquid separation together with the vanadium slag mud from refining step by centrifuge (6)；?
To wet chloride slag and crude titanic chloride liquid；
The wet chloride slag enters wet slag and bakes and banks up with earth process, and the wet chloride slag includes metal oxide, unreacted miberal powder and stone
Oil coke and vanadium slag, temperature are 90 DEG C~120 DEG C；The crude titanic chloride liquid temperature is 90 DEG C~120 DEG C；
Step (4) charging heat exchange process
By the crude titanic chloride liquid and the room temperature crude titanic chloride liquid that need to be refined, in crude titanic chloride preheater (8)
In carry out heat exchange cooling；Obtained crude titanic chloride liquid I, temperature are 60 DEG C~100 DEG C；The crude titanic chloride liquid I 1
Part goes eluting column I 4, another part to remove Heat Exchanger in Circulating Water System I 12；The crude titanic chloride liquid that obtained needs refine, temperature
It is 110 DEG C~119 DEG C；The crude titanic chloride that need to be refined removes refining step after need to further being heated with steam；
(5) one cooling working procedure of step
Step (2) primary air II is introduced into eluting column II (9), is contacted with the spray of crude titanic chloride liquid III, primary air II
In 95%~99% titanium tetrachloride gases by crude titanic chloride liquid III condensation collect；Obtain mainstream gas III and thick four
Titanium chloride liquid IV；IV temperature of crude titanic chloride liquid is 40 DEG C~55 DEG C；The mainstream gas III includes CO2、N2With it is few
Titanium tetrachloride is measured, temperature is less than 40 DEG C~55 DEG C；
A part of IV flow control valve through eluting column collecting tank II (10) of the crude titanic chloride liquid, pressurization, which is continuously introduced into, to follow
Ring water- to-water heat exchanger II (11) obtains the crude titanic chloride liquid III of room temperature through Heat Exchanger in Circulating Water System II (11) heat exchange cooling；It is another
It is cooling that the part crude titanic chloride liquid IV is sent into Heat Exchanger in Circulating Water System I (12)；
(6) two cooling working procedure of step
The mainstream gas III is introduced into eluting column III (13), is contacted with the spray of crude titanic chloride liquid V, in primary air III
95%~99% titanium tetrachloride gases are collected by the condensation of crude titanic chloride liquid V；Obtain on-condensible gas and thick four chlorination
Titanium liquid VI；
The crude titanic chloride liquid IV enters eluting column collecting tank III (14), and VI temperature of crude titanic chloride liquid is -10
DEG C~-5 DEG C；
The on-condensible gas includes CO2、N2With trace titanium tetrachloride, temperature is -18 DEG C~-5 DEG C；
A part of crude titanic chloride liquid VI is continuously introduced into freezing through eluting column collecting tank III (14) flow control valve, pressurization
Liquid heat exchanger (15) obtains crude titanic chloride liquid V through heat exchange cooling, and V temperature of crude titanic chloride liquid is -20 DEG C
~-15 DEG C；Another part crude titanic chloride liquid VI enters thick tetrachloro by the overflow port overflow of eluting column collecting tank III (14)
Change titanium medial launder (16), is stored；
The on-condensible gas removes washing tail gas；
Crude titanic chloride liquid IV in the Heat Exchanger in Circulating Water System I (12) and crude titanic chloride liquid I obtain room temperature through heat exchange
The room temperature crude titanic chloride liquid VII is passed through crude titanic chloride medial launder (16) by crude titanic chloride liquid VII, and described thick four
Titanium chloride medial launder (16) reaches setting liquid level and sends processing outside.
7. a kind of high temperature titanium tetrachloride dusty gas processing method according to claim 6, it is characterised in that：In step (3)
Obtained crude titanic chloride liquid is first passed through storage tank (7) caching, then is passed through in crude titanic chloride preheater (8) by storage tank (7).
8. a kind of high temperature titanium tetrachloride dusty gas processing method according to claim 6, it is characterised in that：By step (1)
It is cooling that obtained high-temperature chlorine slugging is passed through cooling kiln (3)；Low temperature chlorination slag is obtained, sends the low temperature chlorination slag outside processing；Institute
It states low temperature chlorination cinder ladle and includes metal chloride, unreacted miberal powder, petroleum coke, vanadium slag, temperature is 40 DEG C~50 DEG C.
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| CN115924964A (en) * | 2022-11-24 | 2023-04-07 | 云南国钛金属股份有限公司 | Titanium tetrachloride refining system for recovering waste heat of preheater |
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