Titanium white powder filter-press water-washing technique

Abstract

The present invention relates to titanium white powder pressure filtering and water washing technology. In a pressure filtering machine, the water from the main water inlet pipe is led through the branch water pipes to the material cavities in the filtering plates to wash the titanium white powder loaded in the material cavities, while the washed effluent is sweated out through the filtering cloth between filtering plates and to the lower water collecting tank below. The present invention has shortened water flow path, lower water consumption, shortened washing period and high washing effect.

Description

【Technical field】 [0001] The invention relates to a production technology of titanium dioxide, in particular to a water-saving pressure filtration and washing technology of titanium dioxide. 【Background technique】 [0002] Titanium dioxide, scientifically known as titanium dioxide, is an important inorganic chemical product, often used as a white pigment, due to its stable chemical properties, and ideal particle size distribution and refractive index, it is widely used for its good hiding power and tinting power Coatings, inks, plastics, rubber, paper, ceramics and synthetic fibers and other fields. In the production process of titanium dioxide produced by the sulfuric acid method, water washing is a key link in the production of titanium dioxide. The traditional washing method is to use a filter press for suction and water washing. The filter press is composed of many filter plates. There are material chambers, and the material chambers of the filter plates communicate wit...

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Problems solved by technology

In the production process of titanium dioxide produced by the sulfuric acid method, water washing is a key link in the production of titanium dioxide. The traditional washing method is to use a filter press for suction and water washing. The filter press is composed of many filter plates. There are material chambers, and the material chambers of the filter plates communicate with each other through the central water hole. When washing, put the titanium dioxide that needs to be cleaned into the material chambers of each filter plate, and then press the filter plates between each other tightly, and the water passes through. The central water inlet pipe enters centrally, and then enters between the filter plates in turn through the central water hole to clean the titanium dioxide in the filter cavity. In this traditional way, due to the long water flow path, the titanium dioxide in the front filter plate is often cleaned. Clean, but the titanium dioxide in the rear filter plate has not been cleaned, there is a large water consumption, 50 tons of water per ton of titanium dioxide, a lot of sewage, long cleaning time, and incomplete cleaning; at the same time, due to the The titanium dioxide inside is easy to block the central water hole, causing the water flow between the filter plates to form a short circuit, high energy consumption, and even production accidents such as vacuum pouring.

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