阅读说明：本技术 一种制备钛白粉干粉的干燥方法 (Drying method for preparing titanium dioxide dry powder ) 是由 杨英 齐霁 王永和 成文江 饶华进 孙德育 杜严 杨雄武 李松 王成功 于 2021-06-30 设计创作，主要内容包括：一种制备钛白粉干粉的干燥方法,包括以下步骤：一种制备钛白粉干粉的干燥方法,包括以下步骤：通过皮带输送机将带有水分的固体物料导入内部安装有粉碎器的进料槽,进料槽的粉碎器对带有水分的固体物料进行预粉碎,预粉碎后的固体物料粒径最大不超过5cm；然后通过螺旋输送机对预粉碎后的固体物料第二次粉碎,并输送至强力干燥机内,经过第二次粉碎后固体物料粒径最大不超过1cm；强力干燥机将第二次粉碎后的固体物料再次粉碎并干燥后得到气粉；将气粉通过干燥袋滤器过滤得到干粉,干粉为粒径最大不超过1mm的颗粒状物料；通过旋转阀对得到的干粉进行下料操作即可。该方法干燥速度快,效率高,燃气消耗量低。(A drying method for preparing titanium dioxide dry powder comprises the following steps: a drying method for preparing titanium dioxide dry powder comprises the following steps: introducing the solid material with moisture into a feed chute internally provided with a crusher through a belt conveyor, wherein the crusher of the feed chute pre-crushes the solid material with moisture, and the particle size of the pre-crushed solid material is not more than 5cm at most; secondly, crushing the pre-crushed solid material for the second time by using a screw conveyor, conveying the crushed solid material into a powerful dryer, and crushing the solid material for the second time to ensure that the particle size of the solid material is not more than 1cm at most; the strong drier crushes the solid material crushed for the second time again and dries the crushed solid material to obtain gas powder; filtering the gas powder by a drying bag filter to obtain dry powder, wherein the dry powder is granular material with the maximum grain diameter not more than 1 mm; and (4) performing blanking operation on the obtained dry powder through a rotary valve. The method has the advantages of high drying speed, high efficiency and low gas consumption.)

1. A drying method for preparing titanium dioxide dry powder is characterized by comprising the following steps:

(1) introducing the solid material with moisture into a feed chute internally provided with a crusher through a belt conveyor, wherein the crusher of the feed chute pre-crushes the solid material with moisture, and the particle size of the pre-crushed solid material is not more than 5cm at most;

(2) secondly, crushing the pre-crushed solid material for the second time by using a screw conveyor, conveying the crushed solid material into a powerful dryer, and crushing the solid material for the second time to ensure that the particle size of the solid material is not more than 1cm at most;

(3) the strong drier crushes the solid material crushed for the second time again and dries the crushed solid material to obtain gas powder;

(4) filtering the gas powder by a drying bag filter to obtain dry powder, wherein the dry powder is granular material with the maximum grain diameter not more than 1 mm;

(5) and (4) performing blanking operation on the obtained dry powder through a rotary valve.

Technical Field

The invention relates to a drying method for preparing titanium dioxide dry powder.

Background

In the production of titanium dioxide by a chlorination method and a sulfuric acid method, drying equipment used at present is a flash evaporation dryer or a spray dryer, and the drying equipment has the defects of low drying speed and long drying time, so that the capacity is limited. The gas consumption of the equipment is high, the volume of the equipment is large, and the cost is high.

Disclosure of Invention

The invention aims to solve the technical problem of providing a drying method for preparing titanium dioxide dry powder, which has the advantages of high drying speed, high efficiency and low fuel gas consumption.

In order to solve the technical problems, the invention provides a drying method for preparing titanium dioxide dry powder, which comprises the following steps:

a drying method for preparing titanium dioxide dry powder comprises the following steps:

(1) introducing the solid material with moisture into a feed chute internally provided with a crusher through a belt conveyor, wherein the crusher of the feed chute pre-crushes the solid material with moisture, and the particle size of the pre-crushed solid material is not more than 5cm at most;

(2) secondly, crushing the pre-crushed solid material for the second time by using a screw conveyor, conveying the crushed solid material into a powerful dryer, and crushing the solid material for the second time to ensure that the particle size of the solid material is not more than 1cm at most;

(3) the strong drier crushes the solid material crushed for the second time again and dries the crushed solid material to obtain gas powder;

(4) filtering the gas powder by a drying bag filter to obtain dry powder, wherein the dry powder is granular material with the maximum grain diameter not more than 1 mm;

(5) and (4) performing blanking operation on the obtained dry powder through a rotary valve.

For the sake of simplicity, the drying method for preparing titanium dioxide powder according to the present invention is simply referred to as the present method.

The method has the advantages that: the method comprises the steps of pre-crushing large materials into small materials by a crusher of a feeding groove in advance, avoiding blocking a screw conveyer, conveying and secondary crushing by the screw conveyer, reducing the crushing pressure of the crusher in a powerful dryer, feeding the small materials pre-crushed by the screw conveyer into the powerful dryer, strongly crushing the materials by the crusher in the powerful dryer, mixing the materials with hot air at a high speed, dispersing the materials as much as possible, and carrying out powerful drying by the hot air, refining and rapidly dehydrating the materials under the collision, friction and shearing actions of the materials and the materials, so that the drying speed is greatly improved, the drying time is shortened, the productivity is improved, and the fuel gas consumption is reduced by about 10% by calculation and the same evaporation water amount.

Drawings

FIG. 1 is a schematic flow diagram of the process.

Detailed Description

With reference to figure 1 of the drawings,

a drying method for preparing titanium dioxide dry powder comprises the following steps:

1. a drying method for preparing titanium dioxide dry powder is characterized by comprising the following steps:

(1) introducing the solid material with moisture into a feed chute internally provided with a crusher through a belt conveyor, wherein the crusher of the feed chute pre-crushes the solid material with moisture, and the particle size of the pre-crushed solid material is not more than 5cm at most;

(2) secondly, crushing the pre-crushed solid material for the second time by using a screw conveyor, conveying the crushed solid material into a powerful dryer, and crushing the solid material for the second time to ensure that the particle size of the solid material is not more than 1cm at most;

(3) the strong drier crushes the solid material crushed for the second time again and dries the crushed solid material to obtain gas powder;

(4) filtering the gas powder by a drying bag filter to obtain dry powder, wherein the dry powder is granular material with the maximum grain diameter not more than 1 mm;

(5) and (4) performing blanking operation on the obtained dry powder through a rotary valve.

The method has the advantages that: the method comprises the steps of pre-crushing large materials into small materials by a crusher of a feeding groove in advance, avoiding blocking a screw conveyer, conveying and secondary crushing by the screw conveyer, reducing the crushing pressure of the crusher in a powerful dryer, feeding the small materials pre-crushed by the screw conveyer into the powerful dryer, strongly crushing the materials by the crusher in the powerful dryer, mixing the materials with hot air at a high speed, dispersing the materials as much as possible, and carrying out powerful drying by the hot air, refining and rapidly dehydrating the materials under the collision, friction and shearing actions of the materials and the materials, so that the drying speed is greatly improved, the drying time is shortened, the productivity is improved, and the fuel gas consumption is reduced by about 10% by calculation and the same evaporation water amount.

The powerful dryers in this embodiment are all manufactured by jingjiang city new world drying and dust removing equipment; the model is as follows: XFG 1650-1850.