具体实施方式Detailed ways

下面详细描述本发明的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，旨在用于解释本发明，而不能理解为对本发明的限制。Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本发明的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

在本发明的一个方面，本发明提出了一种制备二氧化钛的方法，参考图1-3，根据本发明的实施例，该方法包括：In one aspect of the present invention, the present invention proposes a kind of method for preparing titanium dioxide, with reference to Fig. 1-3, according to the embodiment of the present invention, this method comprises:

S100：四氯化钛第一预热S100: Titanium tetrachloride first preheating

通过燃烧二甲醚提供热量，对四氯化钛进行第一预热，从而可以得到经过第一预热处理的四氯化钛。根据本发明的实施例，利用二甲醚对四氯化钛进行第一预热处理的方式并不受特别限制，根据本发明的具体实施例，可以采用间接加热的方式，利用二甲醚燃烧产生的热量对四氯化钛进行第一预热处理。根据本发明的实施例，经过第一预热处理的四氯化硅的温度并不受特别限制，根据本发明的具体实施例，经过第一预热处理的四氯化硅的温度不低于270摄氏度，该步骤中，所使用的二甲醚作为清洁能源，其易燃，燃烧性能好，热效率高，燃烧过程中无残渣、无黑烟，而且在加热盘管上积碳很少，几乎对热量的传递没有影响，从而减少了吹灰系统和检修工作量的资金和人力投入。由此，可以有效地利用二甲醚燃烧产生的热量对四氯化钛进行加热，进而提高预热效率和二氧化钛生产效率，同时使用二甲醚作为燃料，明显利于环境的改善，并且性质稳定，输送储存更加安全。By burning dimethyl ether to provide heat, the titanium tetrachloride is first preheated, so that the titanium tetrachloride that has undergone the first preheat treatment can be obtained. According to an embodiment of the present invention, the method of using dimethyl ether to perform the first preheating treatment on titanium tetrachloride is not particularly limited. According to a specific embodiment of the present invention, indirect heating can be used to burn The generated heat performs a first preheating treatment on titanium tetrachloride. According to an embodiment of the present invention, the temperature of the silicon tetrachloride undergoing the first preheat treatment is not particularly limited, and according to a specific embodiment of the present invention, the temperature of the silicon tetrachloride undergoing the first preheat treatment is not lower than 270 degrees Celsius. In this step, the dimethyl ether used is used as a clean energy source. It is flammable, has good combustion performance, high thermal efficiency, no residue and no black smoke during the combustion process, and there is little carbon deposit on the heating coil, almost It has no effect on the heat transfer, thereby reducing the capital and manpower input of the soot blowing system and maintenance workload. Thus, the heat generated by the combustion of dimethyl ether can be effectively used to heat titanium tetrachloride, thereby improving the preheating efficiency and the production efficiency of titanium dioxide. At the same time, using dimethyl ether as a fuel is obviously beneficial to the improvement of the environment and has stable properties. Transportation and storage are safer.

S200：四氯化钛第二预热S200: The second preheating of titanium tetrachloride

将铝粉、氯气和经过第一预热处理的四氯化钛在三氯化铝发生器中混合，并使铝粉和氯气反应生成三氯化铝，从而可以得到含有三氯化铝和四氯化钛的混合物，其中，铝粉和氯气反应生成三氯化铝的反应为放热反应，因此可以借助放出的热量对四氯化钛进行第二预热处理，同时铝粉和氯气混合摩尔比为1：1～1：5。根据本发明的实施例，经过第二预热的处理的四氯化钛的温度并不受特别限制，根据本发明的具体实施例，经过第二预热处理的四氯化钛的温度不低于350。由此，可以进一步提高氧化反应效率，从而降低二氧化钛生产成本。Aluminum powder, chlorine gas and titanium tetrachloride which have undergone the first preheating treatment are mixed in an aluminum trichloride generator, and the aluminum powder and chlorine gas are reacted to generate aluminum trichloride, thereby obtaining a compound containing aluminum trichloride and tetrachloride A mixture of titanium chloride, wherein the reaction of aluminum powder and chlorine gas to generate aluminum trichloride is an exothermic reaction, so titanium tetrachloride can be preheated for the second time with the help of the released heat, while aluminum powder and chlorine gas are mixed in moles The ratio is 1:1~1:5. According to an embodiment of the present invention, the temperature of the titanium tetrachloride processed through the second preheating is not particularly limited. According to a specific embodiment of the present invention, the temperature of the titanium tetrachloride processed through the second preheating is not low. at 350. Thus, the oxidation reaction efficiency can be further improved, thereby reducing the production cost of titanium dioxide.

根据本发明的实施例，铝粉和氯气混合摩尔比为1：1～1：5，由此，可以使得铝粉和氯气以适当的配比进行反应，维持三氯化铝和四氯化钛混合物中三氯化铝的比例在0.01%～1%范围内，以便提高二氧化钛晶转化率，从而提高二氧化钛生成率。同时，将三氯化铝的生成和四氯化钛的预热处理有机结合，从而明显降低二氧化钛生产成本。According to the embodiment of the present invention, the mixing molar ratio of aluminum powder and chlorine gas is 1:1 to 1:5, thus, aluminum powder and chlorine gas can be reacted in an appropriate proportion to maintain aluminum trichloride and titanium tetrachloride The proportion of aluminum trichloride in the mixture is in the range of 0.01% to 1%, so as to increase the conversion rate of titanium dioxide crystals, thereby increasing the production rate of titanium dioxide. At the same time, the formation of aluminum trichloride is organically combined with the preheating treatment of titanium tetrachloride, thereby significantly reducing the production cost of titanium dioxide.

S300：氧气第一预热S300: Oxygen first warm-up

通过燃烧二甲醚提供热量，对氧气进行第一预热处理，从而可以得到经过第一预热处理的氧气。根据本发明的实施例，对氧气进行第一预热处理的方式并不受特别限制，根据本发明的具体实施例，可以采用间接加热的方式，利用二甲醚燃烧产生的热量对氧气进行第一预热处理。根据本发明的实施例，经过第一预热处理的氧气的温度并不受特别限制，根据本发明的具体实施例，经过第一预热处理的氧气的温度不低于750摄氏度。由此，可以显著提高氧化效率，以便进一步降低二氧化钛生产成本。The heat is provided by burning dimethyl ether, and the first preheating treatment is performed on the oxygen, so that the oxygen that has undergone the first preheating treatment can be obtained. According to the embodiment of the present invention, the method of performing the first preheating treatment on oxygen is not particularly limited. According to a specific embodiment of the present invention, the method of indirect heating can be used to perform the first preheating treatment on oxygen by using the heat generated by the combustion of dimethyl ether. 1. Preheat treatment. According to an embodiment of the present invention, the temperature of the oxygen undergoing the first preheating treatment is not particularly limited. According to a specific embodiment of the present invention, the temperature of the oxygen undergoing the first preheating treatment is not lower than 750 degrees Celsius. Thereby, the oxidation efficiency can be significantly improved, so as to further reduce the production cost of titanium dioxide.

S400：氧气第二预热S400: Second preheating with oxygen

通过燃烧甲苯提供热量，对经过第一预热处理的氧气进行第二预热处理，从而可以得到经过第二预热处理的氧气。根据本发明的实施例，经过第二预热处理的氧气的温度并不受特别限制，根据本发明的具体实施例，经过第二预热处理的氧气的温度不低于1500摄氏度。根据本发明的实施例，对经过第一预热处理的氧气进行第二预热处理的方式并不受特别限制，根据本发明的具体实施例，可以将甲苯与经过第一预热处理的氧气进行混合，并燃烧放出热量对经过第一预热处理的氧气进行第二预热处理。由此，可以显著提高氧化效率，从而进一步降低二氧化钛生产成本。By burning toluene to provide heat, the oxygen that has undergone the first preheating treatment is subjected to the second preheating treatment, so that the oxygen that has undergone the second preheating treatment can be obtained. According to an embodiment of the present invention, the temperature of the oxygen undergoing the second preheating treatment is not particularly limited. According to a specific embodiment of the present invention, the temperature of the oxygen undergoing the second preheating treatment is not lower than 1500 degrees Celsius. According to an embodiment of the present invention, the manner of performing the second preheating treatment on the oxygen after the first preheating treatment is not particularly limited. According to a specific embodiment of the present invention, toluene can be combined with the oxygen Mixing is performed and combustion releases heat to perform a second preheating treatment on the oxygen that has undergone the first preheating treatment. Thus, the oxidation efficiency can be significantly improved, thereby further reducing the production cost of titanium dioxide.

S500：氧化反应S500: Oxidation reaction

将经过第二预热处理所得的三氯化铝和四氯化钛混合物与经过第二预热处理的氧气在氧化反应装置中进行混合，使得四氯化钛和氧气发生氧化反应，并向氧化反应装置中加入二氧化硅作为除疤砂，从而可以获得含有二氧化钛和氯气的氧化反应混合物。该步骤中，氧化反应方程式为：TiCl₄+O₂=TiO₂+2Cl₂。Mix the aluminum trichloride and titanium tetrachloride mixture obtained through the second preheating treatment with the oxygen after the second preheating treatment in the oxidation reaction device, so that the titanium tetrachloride and oxygen undergo an oxidation reaction, and oxidize Silica is added into the reaction device as the sand for removing scars, so that an oxidation reaction mixture containing titanium dioxide and chlorine can be obtained. In this step, the oxidation reaction equation is: TiCl ₄ +O ₂ =TiO ₂ +2Cl ₂ .

S600：气固分离处理S600: Gas-solid separation treatment

将氧化反应混合物进行气固分离处理，从而可以获得二氧化钛和氯气。The oxidation reaction mixture is subjected to gas-solid separation treatment, so that titanium dioxide and chlorine gas can be obtained.

具体的，参考图2，首先利用循环水对所得氧化反应混合物进行快速冷却，根据本发明的实施例，对氧化反应混合物进行冷却处理的条件并不受特别限制，根据本发明的具体实施例，利用循环水，将氧化反应混合物在1分钟内快速冷却至500摄氏度以下。由此，可以避免二氧化钛晶体在高温下增长和相互粘结。然后利用袋式过滤器对经过冷却处理的氧化反应混合物进行气固分离处理，从而可以获得含有氯气的气体尾气以及包含二氧化钛和除疤砂的固体混合物。将含有二氧化钛和除疤砂的固体混合物加入到基料制浆罐中，并向基料制浆罐中加入除盐水进行制浆。Specifically, referring to FIG. 2 , first, the obtained oxidation reaction mixture is rapidly cooled by circulating water. According to an embodiment of the present invention, the conditions for cooling the oxidation reaction mixture are not particularly limited. According to a specific embodiment of the present invention, Using circulating water, the oxidation reaction mixture is rapidly cooled to below 500 degrees Celsius within 1 minute. Thereby, growth and mutual bonding of titanium dioxide crystals at high temperatures can be avoided. Then, the cooled oxidation reaction mixture is subjected to gas-solid separation using a bag filter, so that a gas tail gas containing chlorine and a solid mixture containing titanium dioxide and scar removal sand can be obtained. Add the solid mixture containing titanium dioxide and descaling sand into the base material pulping tank, and add demineralized water into the base material pulping tank for pulping.

将所得的浆料通过除疤砂的连续加料装置加入到除疤砂分离装置中，从而可以分离得到除疤砂回收料和钛白粉浆料，该步骤中。具体的，采用能连续运转并带有洗剂功能的圆筒筛，为确保连续分离出固体颗粒，并且磨损小，不采用振动筛，并且筛孔的孔径为350～450微米，分离过程中由于对后处理工序的料浆固含量有要求，所以在分离过程中洗剂水用量不能太大，同时，通过除疤砂筛从基料中分离出来的除疤砂表面还会有残留少量的二氧化钛基料，因此将分离出来的除疤砂通过螺旋输送到除疤砂洗涤系统用去离子水对除疤砂进行再次洗涤；操作过程中由螺旋输送机将从除疤砂滚筒筛输送过来的砂送入到砂洗涤槽，洗涤槽的底部安装有筛网，并且与洗涤水系统相连接，在洗涤槽的上部沿装有四个高度可以调节的冲洗系统，这样可以确保洗涤槽表面的砂层能够洗涤充分，上部冲洗完成之后最后一次洗涤由洗涤槽底部的洗涤水系统进入去离子水对砂进行洗涤，水量通过流量计实际工艺情况进行自动控制。洗涤完成的砂在洗砂槽内积聚，为控制砂的给料和卸料情况，此系统还带有一个自动控制系统，控制洗砂槽内砂的料位（卸料点），确保砂层到达卸料点时控制系统在中断进砂的同时通过卸料螺旋卸料。卸料时不能把砂全部卸出，应在洗涤槽底部保留一定的砂层厚度。砂层的厚度可以取决于洗涤器的型号，通常为40～55mm。The obtained slurry is fed into the scar removal sand separation device through the continuous feeding device of the scar removal sand, so that the recycled material of the scar removal sand and the titanium dioxide slurry can be separated. In this step. Specifically, a cylindrical sieve that can operate continuously and has a detergent function is used. In order to ensure continuous separation of solid particles and less wear, a vibrating screen is not used, and the pore size of the sieve is 350-450 microns. During the separation process, due to There are requirements for the solid content of the slurry in the post-treatment process, so the amount of lotion water used during the separation process should not be too large. At the same time, a small amount of titanium dioxide will remain on the surface of the scar removal sand separated from the base material through the scar removal sand screen The base material, so the separated descaling sand is conveyed to the descarring sand washing system by a screw to wash the descarring sand again with deionized water; during the operation, the sand transported from the descarring sand drum sieve is conveyed by the screw conveyor It is fed into the sand washing tank, and the bottom of the washing tank is equipped with a screen and connected to the washing water system. Four height-adjustable flushing systems are installed on the upper part of the washing tank, so that the sand layer on the surface of the washing tank can be ensured. It can be fully washed. After the upper washing is completed, the washing water system at the bottom of the washing tank enters the deionized water to wash the sand for the last washing. The water volume is automatically controlled by the actual process conditions of the flow meter. The washed sand accumulates in the sand washing tank. In order to control the feeding and unloading of the sand, this system also has an automatic control system to control the material level (discharging point) of the sand in the sand washing tank to ensure that the sand layer When reaching the unloading point, the control system unloads through the unloading screw while interrupting the sand feeding. When unloading, the sand cannot be completely discharged, and a certain thickness of the sand layer should be reserved at the bottom of the washing tank. The thickness of the sand layer can depend on the type of scrubber, usually 40-55mm.

将所得的除疤砂回收料进行蒸汽干燥处理，从而可以得到经过干燥的除疤砂。具体的，从除疤砂洗剂系统中分离出来的除疤砂为含水量20%的湿除疤砂，将其通过螺旋输送到主体为回转圆筒并且筒内设置有多层加热管的干燥机中，干燥机内的物料随着筒体的转动，不断提升、扬洒，通过对流、传导、辐射等多种换热方式被干燥，并借助于干燥机的斜度从较高一端向较低一端移动，最后含水率小于0.3%由干燥机尾部的出料旋转阀排出。同时，蒸汽在干燥过程中放热后形成冷凝水，经疏水阀排入冷凝水管网循环使用。The obtained reclaimed sand removal material is steam-dried to obtain dried sand removal sand. Specifically, the scar removal sand separated from the scar removal sand lotion system is wet scar removal sand with a water content of 20%, which is conveyed by a screw to a drying machine whose main body is a rotating cylinder and which is equipped with a multi-layer heating tube. In the dryer, the material in the dryer is continuously lifted and sprinkled with the rotation of the cylinder, and is dried through various heat exchange methods such as convection, conduction, and radiation, and is transferred from the higher end to the lower end with the help of the inclination of the dryer. The lower end moves, and finally the moisture content is less than 0.3%, and it is discharged from the discharge rotary valve at the tail of the dryer. At the same time, the steam releases heat during the drying process to form condensed water, which is discharged into the condensed water pipe network through the trap for recycling.

将所得经过干燥的除疤砂返回至氧化反应装置中，具体的，经过干燥的除疤砂从干燥机排出后，通过皮带输送机、斗提机、进入干砂料仓，干砂通过一个砂分离器分离出粒度小于0.7mm的碎砂，粒径为0.7mm﹤d﹤1.2mm的干砂返回除疤砂加料系统循环使用。另外，从干燥机排出的废气中含有一定的粉尘，为满足环境要求，工艺系统中设有袋式除尘器，废气除尘后经引风机达标排放，并且收集的粉尘经袋式除尘器下部的旋阀排除系统。Return the dried scar removal sand to the oxidation reaction device. Specifically, after the dried scar removal sand is discharged from the dryer, it enters the dry sand silo through a belt conveyor and bucket elevator, and the dry sand passes through a sand The separator separates the crushed sand with a particle size of less than 0.7mm, and the dry sand with a particle size of 0.7mm﹤d﹤1.2mm is returned to the scar removal sand feeding system for recycling. In addition, the exhaust gas discharged from the dryer contains a certain amount of dust. In order to meet the environmental requirements, a bag filter is installed in the process system. Valve exhaust system.

下面参考图3描述根据本发明实施例的制备二氧化钛的方法中采用的除疤砂的连续加料装置100。如图3所示，连续加料装置100包括：加料装置10、加料料罐20、喷吹料罐30和给料螺旋装置40。The continuous feeding device 100 for scar removal sand used in the method for preparing titanium dioxide according to the embodiment of the present invention will be described below with reference to FIG. 3 . As shown in FIG. 3 , the continuous feeding device 100 includes: a feeding device 10 , a feeding tank 20 , a blowing tank 30 and a feeding screw device 40 .

具体地，加料料罐20设在加料装置10的下游，加料装置10和加料料罐20之间设有用于导通和截断加料装置10和加料料罐20的第一罐装锁51。加料料罐20上设有用于检测物料容量的感应器23，感应器23和第一罐装锁51电连接。其中，感应器23上设有最小料位和最大料位，感应器23由电动气动装置控制。当加料料罐20上的物料位于感应器23上的最小料位时，感应器23将物料不足信息反馈给电动气动装置，电动气动装置发出第一罐装锁51解锁的信号，第一罐装锁51导通加料装置10和加料罐之间的连通管道，物料从加料装置10流到加料罐内；当加料料罐20上的物料位于感应器23上的最大料位时，感应器23将物料已经加满的信息反馈给电动气动装置，第一罐装锁51截断加料装置10和加料罐之间的连通管道。物料可以为除疤砂的固定颗粒的混合物。Specifically, the feeding tank 20 is arranged downstream of the feeding device 10 , and a first filling lock 51 for connecting and disconnecting the feeding device 10 and the feeding tank 20 is provided between the feeding device 10 and the feeding tank 20 . The feeding tank 20 is provided with a sensor 23 for detecting material capacity, and the sensor 23 is electrically connected with the first filling lock 51 . Wherein, the minimum material level and the maximum material level are set on the sensor 23, and the sensor 23 is controlled by an electro-pneumatic device. When the material on the feeding tank 20 is at the minimum material level on the sensor 23, the sensor 23 feeds back the material shortage information to the electropneumatic device, and the electropneumatic device sends a signal for unlocking the first canning lock 51, and the first canning lock 51 is unlocked. The lock 51 conducts the connecting pipe between the feeding device 10 and the feeding tank, and the material flows from the feeding device 10 into the feeding tank; when the material on the feeding tank 20 is at the maximum level on the sensor 23, the sensor 23 will The information that the material has been filled is fed back to the electropneumatic device, and the first canning lock 51 blocks the communication pipeline between the feeding device 10 and the feeding tank. The material can be a mixture of fixed particles of scar removal sand.

喷吹料罐30设在加料料罐20的下游，加料料罐20和喷吹料罐30之间设有用于导通和截断喷吹料罐30和加料料罐20的第二罐装锁52。给料螺旋装置40设在喷吹料罐30下游，给料螺旋装置40具有物料出口。其中，喷吹料罐30的进口端与加料料罐20的出口端相连。当加料料罐20内的物料已经加满时，可以开启第二罐装锁52，第二罐装锁52导通加料料罐20和喷吹料罐30之间的连通管道，物料开始流入喷吹料罐30内。物料在喷吹料罐30内被均匀吹散后进入给料螺旋装置40内。物料在给料螺旋装置40内被进一步打散成成细小颗粒状，且从物料出口连续不断地喷入氧化反应器中，去除氧化反应器中内壁上的氧化钛结疤。其中，喷吹料罐30与给料螺旋装置40始终是导通的。换句话说，除疤砂固体颗粒可以不间断地传送到氧化反应器内，以保证氯化钛氧化体系正常稳定地运行。The blowing material tank 30 is located at the downstream of the feeding material tank 20, and the second filling lock 52 for conducting and cutting off the spraying material tank 30 and the feeding material tank 20 is provided between the feeding material tank 20 and the spraying material tank 30 . The feeding screw device 40 is arranged downstream of the blowing material tank 30, and the feeding screw device 40 has a material outlet. Wherein, the inlet end of the spraying material tank 30 is connected with the outlet end of the feeding material tank 20 . When the material in the feeding tank 20 has been filled up, the second canning lock 52 can be opened, and the second canning lock 52 leads to the connecting pipe between the feeding tank 20 and the blowing tank 30, and the material starts to flow into the spraying tank 30. In the blowing tank 30. The material enters the feeding screw device 40 after being uniformly blown in the blowing material tank 30 . The material is further broken into fine particles in the feeding screw device 40, and is continuously sprayed into the oxidation reactor from the material outlet to remove the titanium oxide scarring on the inner wall of the oxidation reactor. Wherein, the blowing material tank 30 and the feeding screw device 40 are always connected. In other words, the solid particles of the scar removal sand can be continuously delivered to the oxidation reactor to ensure the normal and stable operation of the titanium chloride oxidation system.

根据本发明实施例的制备二氧化钛的方法中采用的除疤砂的连续加料装置100，可以向氧化反应器中连续不断地喷入除疤砂，去除氧化反应器内壁上的氧化钛结疤，从而保证氯化钛氧化体系在受热均匀地情况下正常稳定地进行。According to the continuous feeding device 100 for scar removal sand used in the method for preparing titanium dioxide according to the embodiment of the present invention, the scar removal sand can be continuously sprayed into the oxidation reactor to remove the titanium oxide scab on the inner wall of the oxidation reactor, thereby Ensure that the titanium chloride oxidation system is normally and stably carried out under the condition of uniform heating.

根据本发明的一些实施例，给料螺旋装置40上设有气体通入口41以向给料螺旋装置40内通入气体。通入的气体将除疤砂固体颗粒转换成高-低密度相同的流态化物和气体的混合体，混合体在高气压下均匀喷入氧化反应器内。其中，气体可以为氮气。当然，本发明并不限于此，气体也可以为其他一些惰性气体。According to some embodiments of the present invention, the feeding screw device 40 is provided with a gas inlet 41 for feeding gas into the feeding screw device 40 . The injected gas converts the solid particles of the sand removal into a mixture of high-low density fluidized substance and gas, and the mixture is uniformly sprayed into the oxidation reactor under high pressure. Wherein, the gas may be nitrogen. Certainly, the present invention is not limited thereto, and the gas may also be other inert gases.

在本发明的一些实施例中，连续加料装置100中还可以包括气体驱动装置11。气体驱动装置11设在加料装置10上以驱动加料装置10向加料料罐20供料。可选地，除疤砂采用大袋运输。其中，加料装置10可以是加料斗（图未示出），加料斗的上端敞开。加料斗的进口端大于出口端，有利于物料向加料料罐20流动。这样，在第一罐装锁51和气体驱动装置11同时导通的情况下，加料斗中的物料可以向加料料罐20流动，以实现对加料料罐20供料。In some embodiments of the present invention, the continuous feeding device 100 may further include a gas driving device 11 . The gas driving device 11 is arranged on the feeding device 10 to drive the feeding device 10 to feed the feeding tank 20 . Optionally, the scar removal sand is shipped in big bags. Wherein, the feeding device 10 may be a hopper (not shown in the figure), and the upper end of the hopper is open. The inlet end of the feeding hopper is larger than the outlet end, which is conducive to the flow of materials to the feeding tank 20 . In this way, under the condition that the first filling lock 51 and the gas driving device 11 are connected at the same time, the material in the feeding hopper can flow to the feeding tank 20 to realize the feeding of the feeding tank 20 .

需要说明的是，加料装置10还可以是加料仓22，加料仓22相对于外界为封闭壳体，进一步地，可以在加料料罐20上可以设置排气阀21，这样，当加料料罐20内的压力较大时，可以打开排气阀21降低加料料罐20内的压力，从而便于物料从加料仓22流进加料料罐20内。It should be noted that the feeding device 10 can also be a feeding bin 22, and the feeding bin 22 is a closed shell relative to the outside world. Further, an exhaust valve 21 can be set on the feeding tank 20, so that when the feeding tank 20 When the pressure inside is high, the exhaust valve 21 can be opened to reduce the pressure in the feeding tank 20, so that the material flows from the feeding bin 22 into the feeding tank 20.

根据本发明的另一些实施例，连续加料装置100还可以包括流态化锥60。流态化锥60设在加料料罐20和喷吹料罐30下部。流态化锥60的底部可以设有进气阀，加料料罐20加料过程中，可以打开进气阀，气体进入加料料罐20内，包围在物料颗粒的周围，从而初步实现物料的流态化。经过初步流化的物料从加料料罐20的出口端流出，进入到喷吹料罐30内，流态化锥60再次对物料进行流态化，从而获得高-低密度相间的流态化物和气体的混合物。According to other embodiments of the present invention, the continuous feeding device 100 may further include a fluidization cone 60 . The fluidization cone 60 is arranged at the lower part of the feed tank 20 and the injection tank 30 . The bottom of the fluidization cone 60 can be provided with an air inlet valve. During the feeding process of the feeding tank 20, the inlet valve can be opened, and the gas enters the feeding tank 20 and surrounds the material particles, thereby initially realizing the fluid state of the material. change. The preliminarily fluidized material flows out from the outlet end of the feeding tank 20 and enters the injection tank 30, and the fluidizing cone 60 fluidizes the material again, thereby obtaining a high-low density interphase fluidized material and mixture of gases.

进一步地，连续加料装置100还可以包括：压力调节装置31和流量控制装置80。其中，压力调节装置31设在喷吹料罐30上以调节喷吹料罐30内的压力。例如，喷吹料罐30内压力较大的情况下，可以通过压力调节装置31降低喷吹料罐30内的压力，使得喷吹料罐30内的压力小于加料料罐20内的压力，从而有利于物料在重力的作用下流入喷吹料罐30内。Further, the continuous feeding device 100 may further include: a pressure regulating device 31 and a flow control device 80 . Wherein, the pressure regulating device 31 is arranged on the injection material tank 30 to adjust the pressure in the injection material tank 30 . For example, when the pressure in the blowing material tank 30 is relatively large, the pressure in the blowing material tank 30 can be reduced by the pressure regulator 31, so that the pressure in the blowing material tank 30 is less than the pressure in the feeding material tank 20, thereby It is beneficial for materials to flow into the injection tank 30 under the action of gravity.

流量控制装置80设在喷吹料罐30的供料口的下游且用于调节向给料螺旋装置40供料的物料流量。流量控制装置80的进口端与喷吹料罐30相连，流量控制装置80的出口端与给料螺旋装置40相连。其中，在流量控制装置80内预设有物料流量预定值，预定值的范围可以为：20～40kg/h。例如，当氧化反应器内的反应物料较少时，可以将流量设定为20kg/h；当氧化反应器内的反应物料处于中间量时，可以将流量设定为30kg/h；当氧化反应器内的反应物料较多时，可以将流量设定为40kg/h。当然，本发明并不限于此。The flow control device 80 is arranged downstream of the feed port of the blowing tank 30 and is used to adjust the flow rate of the material fed to the feeding screw device 40 . The inlet end of the flow control device 80 is connected with the injection tank 30 , and the outlet end of the flow control device 80 is connected with the feeding screw device 40 . Wherein, a preset material flow rate is preset in the flow control device 80, and the range of the preset value may be: 20-40 kg/h. For example, when the reaction material in the oxidation reactor is less, the flow rate can be set to 20kg/h; when the reaction material in the oxidation reactor is in the middle, the flow rate can be set to 30kg/h; when the oxidation reaction When there are many reaction materials in the device, the flow rate can be set to 40kg/h. Of course, the present invention is not limited thereto.

下面描述根据本发明实施例的制备二氧化钛的方法中采用的除疤砂的连续加料装置100的工作过程，打开气体驱动装置11和第一罐装锁51，在气体驱动装置11的驱动下，物料向加料料罐20方向流动，同时从流态化锥60进入的气体向上流动，与物料的流动方向相反，从而保证物料被充分的流化，当感应器23检测到加料料罐20内的料满时，关闭第一罐装锁51；接着打开第二罐装锁52和流态化锥60，物料从加料料罐20向喷吹料罐30方向流动，物料被进一步流化，获得充分流化后的流态化物和气体的混合体；通过调节流量控制装置80，控制混合体进入给料螺旋装置40的流速，混合体在给料螺旋装置40内与氮气混合后形成较大的气压后，从给料螺旋装置40的出口喷入到氧化反应器内，去除氧化反应器内氧化钛结疤。当感应器23检测到加料料罐20内的物料小于等于最小料位时，则可以重新启动加料料罐20的加料过程，在此过程中，若出现加料料罐20内的压力大于加料装置10内的压力时，则可以通过打开加料料罐20上的排气阀21，从而降低其内的压力。当然，上述过程中只是连续加料装置100的基本过程，在实际的生产工艺过程中，可以作出适应性的调整。The following describes the working process of the continuous feeding device 100 for removing scar sand used in the method for preparing titanium dioxide according to the embodiment of the present invention. Open the gas drive device 11 and the first canning lock 51, and under the drive of the gas drive device 11, the material The gas flows in the direction of the feeding tank 20, and at the same time, the gas entering from the fluidization cone 60 flows upwards, which is opposite to the flow direction of the material, so as to ensure that the material is fully fluidized. When the sensor 23 detects the material in the feeding tank 20 When full, close the first canning lock 51; then open the second canning lock 52 and the fluidization cone 60, the material flows from the feeding tank 20 to the injection tank 30, and the material is further fluidized to obtain sufficient flow. The mixture of fluidized substance and gas after liquefaction; by adjusting the flow control device 80, the flow rate of the mixture entering the feeding screw device 40 is controlled, and the mixture is mixed with nitrogen in the feeding screw device 40 to form a larger air pressure. , is sprayed into the oxidation reactor from the outlet of the feeding screw device 40, and removes the titanium oxide scab in the oxidation reactor. When the sensor 23 detects that the material in the feeding tank 20 is less than or equal to the minimum material level, the feeding process of the feeding tank 20 can be restarted. In the process, if the pressure in the feeding tank 20 is greater than that of the feeding device 10 When the internal pressure is high, then the exhaust valve 21 on the feed tank 20 can be opened to reduce the internal pressure. Of course, the above process is only the basic process of the continuous feeding device 100, and adaptive adjustments can be made in the actual production process.

根据本发明实施例的制备二氧化钛的方法，能够有效地快速对四氯化钛氧化反应的原料进行预热，并且得到三氯化铝，从而可以有效地生成粒径均匀的二氧化钛，进而可以提高制备二氧化钛的效率，同时，通过该方法实现了除疤砂的循环利用，从而显著降低制备二氧化钛的成本。The method for preparing titanium dioxide according to the embodiment of the present invention can effectively and quickly preheat the raw materials for the oxidation reaction of titanium tetrachloride, and obtain aluminum trichloride, so that titanium dioxide with uniform particle size can be effectively generated, and the production efficiency can be improved. The efficiency of titanium dioxide, at the same time, the recycling of scar removal sand is realized by this method, thereby significantly reducing the cost of preparing titanium dioxide.

在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

尽管已经示出和描述了本发明的实施例，本领域的普通技术人员可以理解：在不脱离本发明的原理和宗旨的情况下可以对这些实施例进行多种变化、修改、替换和变型，本发明的范围由权利要求及其等同物限定。Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the invention is defined by the claims and their equivalents.