Background technology:
The chloridized dust collection slag that titanium tetrachloride production produces, after process solid dust-precipitator gathers dust and handles, impurity grits such as the iron trichloride of greater particle size, ferrous chloride, aluminum chloride, carbon are collected, are discharged by the solid dust-precipitator, and the impurity grit that particle diameter is tiny then can not be collected fully by the solid dust-precipitator.Be not collected process gass such as the contaminant particles of getting off and gas titanium tetrachloride and enter subsequent processing together, if to this dust-laden titanium tetrachloride drip washing, condensation, liquefaction, impurity grits such as iron trichloride, ferrous chloride, aluminum chloride, carbon will enter titanium tetrachloride liquid, form the muddy titanium tetrachloride.The dust-laden titanium tetrachloride is in carrying out condensation, liquefaction processing process, and grit will precipitate, deposit at pipeline, and therefore last blocking pipe must deviate from the solid grit in the titanium tetrachloride.These grits are collected, removed to domestic general method for dust removal by crude titanic chloride is filtered.The result of Chu Liing is like this, and (1) filters still residual a large amount of titanium tetrachloride in the waste residue, reclaims through pervaporation, and still some titanium tetrachloride together discards with filtering waste residue, the titanium tetrachloride yield is reduced, simultaneously wasteful energy; (2) cleaning, during the washing and filtering slag, volatilization and hydrolysis take place in titanium tetrachloride, produce harmfully to be difficult to the smog of handling again and to consume a large amount of water.(3) filter residue blocking filter in the filtration procedure, strainer need open wide cleaning, the obstruction of the titanyl throw out of titanium tetrachloride and dilute hydrochloric acid, corroded pipeline when producing smog.
Summary of the invention:
For the titanium tetrachloride yield that solves existing method existence reduces, wasteful energy of while and water, the problem of obstruction, corrosion pipeline proposes following technical scheme.
The present invention is achieved in that
The gather dust liquid phase collecting method of slag of titanium tetrachloride solid, its special character is that the titanium tetrachloride gases that contains iron trichloride, ferrous chloride, aluminum chloride, carbon micronic dust from furnace gas temperature control, dedusting operation enters the liquid phase dust-precipitator from the tower upper side of gathering dust, with spray liquid titanium tetrachloride and mix, cool off, enter connectivity slot together; Another tower that gathers dust sprays the liquid titanium tetrachloride of getting off, and further the dust-laden titanium tetrachloride cools off, washs in the connectivity slot to entering; Iron trichloride, ferrous chloride, aluminum chloride, carbon micronic dust enter titanium tetrachloride mud circulation jar with liquid titanium tetrachloride, the titanium tetrachloride gases that does not contain micronic dust after the purification enters the drip washing operation from another tower top of gathering dust, dust-laden titanium tetrachloride in the titanium tetrachloride mud circulation jar, afterwards a part enters the cooling of liquid phase dust-precipitator spray, another part returns temperature control, dedusting operation to be delivered to the interchanger cooling by slush pump under the liquid, carry out furnace gas temperature control to the chlorination generation, the grit that returns in the titanium tetrachloride is removed in the dedusting of control solid dust-precipitator simultaneously.
In the aforesaid method, dust-laden titanium tetrachloride in the titanium tetrachloride mud circulation jar, being delivered to interchanger cooling back 70%~98% by slush pump under the liquid enters liquid phase dust-precipitator spray cooling, 2%~30% and returns temperature control, dedusting operation, carry out furnace gas temperature control to the chlorination generation, the grit that returns in the titanium tetrachloride is removed in the dedusting of control solid dust-precipitator simultaneously.
In the aforesaid method, the dust-laden titanium tetrachloride gases temperature that enters the liquid phase dust-precipitator is 136 ℃~280 ℃, and the titanium tetrachloride temperature after the interchanger heat exchange is 50 ℃~100 ℃, and dust-laden liquid titanium tetrachloride temperature is 60 ℃~120 ℃ in the titanium tetrachloride mud circulation jar.The gaseous titanium tetrachloride amount that cools down is not more than the titanium tetrachloride amount of returning temperature control, dedusting operation.
Iron trichloride, ferrous chloride, aluminum chloride, carbon micronic dust enter the liquid phase dust-precipitator, through titanium tetrachloride spray, condensation, cleaning function, enter liquid titanium tetrachloride, and are collected in the titanium tetrachloride mud circulation jar.Titanium tetrachloride mud is through the interchanger cooling, and 70%~98% is used for spray, cooling, the temperature control of liquid phase dust-precipitator; 2%~30% is used to return furnace gas temperature control, dedusting operation, carries out furnace gas temperature control, the dedusting of solid dust-precipitator, and the grit that returns in the titanium tetrachloride is removed in the solid dust-precipitator.In the liquid phase dust-precipitator through after the drip washing, clean titanium tetrachloride enters the drip washing operation, realizes the solid liquid phase of the slag processing intent of gathering dust of gathering dust.
The equipment of realizing aforesaid method comprises slush pump under titanium tetrachloride mud circulation jar, liquid phase dust-precipitator, spray equipment, interchanger, the liquid.The liquid phase dust-precipitator is made up of gather dust tower and the connectivity slot of two parallel connections, and the bottom of two towers that gather dust links to each other with connectivity slot, and the top of tower that gathers dust is equipped with spray equipment.
The present invention has following advantage and effect
(1) realized that chlorination is with the autonomous temperature control dedusting of the liquid phase of titanium tetrachloride effusion micronic dust, separation and removal; Cancelled filtration, evaporation, cleaning technology and the equipment of conventional processes, shortened technology, conserve energy 10%~20% improves titanium tetrachloride yield 2%~5%.
(2) equipment that changed traditional filtering, evaporation, cleaning frequently dismantle, the intermittent operation mode, realized the continuous operation of equipment closed operation, front and back technology organic connection.
(3) equipment closed operation has been avoided at the scene dismounting, cleaning equipment, has been eliminated the possibility that produces titanium tetrachloride smog, has improved production environment.
Embodiment
Narrate embodiment with reference to the accompanying drawings.
Realize that the gather dust equipment of liquid phase collecting method of slag of titanium tetrachloride solid is made of slush pump 5 under titanium tetrachloride mud circulation jar 1, liquid phase dust-precipitator 2, spray equipment 3, interchanger 4, the liquid.Liquid phase dust-precipitator 2 by two parallel connections gather dust tower 2.1 and 2.2 and connectivity slot 2.3 form, the bottom of two towers that gather dust links to each other with connectivity slot 2.3, the top of tower inboard of gathering dust is equipped with spray equipment 3.Slush pump 5 under the liquid is installed in the titanium tetrachloride mud circulation jar 1, and through interchanger 4, some is sprayed in the tower that gathers dust by spray equipment 3 to liquid phase dust-precipitator 2 the suction of the titanium tetrachloride in the titanium tetrachloride mud circulation jar 1 for it; Another partly returns a temperature control, dedusting operation.Interchanger 4 adopts double-pipe exchangers, is used for the titanium tetrachloride liquid that slush pump 5 is carried under the cooling fluid.
The gather dust liquid phase collecting method of slag of titanium tetrachloride solid, its special character is that the titanium tetrachloride gases that contains iron trichloride, ferrous chloride, aluminum chloride, carbon micronic dust from furnace gas temperature control, dedusting operation enters liquid phase dust-precipitator 2 from tower 2.1 upper side of gathering dust, with spray liquid titanium tetrachloride and mix, cool off, enter connectivity slot 2.3 together; Another liquid titanium tetrachloride that tower 2.2 sprays of gathering dust, further the dust-laden titanium tetrachloride cools off, washs in the connectivity slot 2.3 to entering; Iron trichloride, ferrous chloride, aluminum chloride, carbon micronic dust enter titanium tetrachloride mud circulation jar 1 with liquid titanium tetrachloride, the titanium tetrachloride gases that does not contain micronic dust after the purification enters the drip washing operation from tower 2.2 tops of gathering dust, dust-laden titanium tetrachloride in the titanium tetrachloride mud circulation jar 1, being delivered to interchanger 4 cooling back 70%~98% by slush pump under the liquid 5 enters liquid phase dust-precipitator 2 spray coolings, 2%~30% and returns temperature control, dedusting operation, carry out furnace gas temperature control to the chlorination generation, the grit that returns in the titanium tetrachloride is removed in the dedusting of control solid dust-precipitator simultaneously.
In the aforesaid method, enter 136 ℃~280 ℃ of the dust-laden titanium tetrachloride gases temperature of liquid phase dust-precipitator, 50 ℃~100 ℃ of titanium tetrachloride temperature after the interchanger heat exchange, dust-laden liquid titanium tetrachloride temperature is 60 ℃~120 ℃ in the titanium tetrachloride mud circulation jar, and the gaseous titanium tetrachloride amount that cools down is not more than the titanium tetrachloride amount of returning temperature control, dedusting operation.