Carbonating tower, carbonating system and method

Abstract

The invention relates to a carbonation tower, a carbonation system and a method, comprising a tower shell, a cooling water tank, an air inlet, an air outlet, a feed port and a discharge port arranged on the tower shell, and a The stirring shaft, the motor connected to the stirring shaft, the stirring blades fixed on the stirring shaft, the inner side of the tower shell is fixed with a baffle, the carbonation system consists of a plurality of carbonation towers connected; the gas outlet of the carbonation tower is connected with a single Or the inlets of multiple carbonation towers are connected through gas connecting pipes, or the inlets of the carbonation towers are fed separately, and the gas outlets of the carbonation towers are directly exhausted. The above two connection methods are freely combined; The discharge port communicates with the feed ports of one or more carbonation towers through feed-liquid connecting pipes. The structure in the carbonation tower of the present invention is simple, no fouling and blockage, simple control, and the prepared product has coarse crystal particles, containing Chlorine is low.

Description

technical field [0001] The invention relates to a preparation device and method of soda ash industrial products, in particular to a carbonation tower, a carbonation system and a method. Background technique [0002] The soda ash industry has been in existence for more than 150 years since its birth in 1865. The products of the soda ash industry include soda ash, baking soda, and ammonium bicarbonate. The carbonation process is the most critical step in the soda industry (including soda ash, baking soda, ammonium bicarbonate production, etc.), which requires a faster absorption rate and a higher degree of carbonation completion. [0003] "Soda Ash Engineering" Second Edition, Chemical Industry Press, page P181 introduces carbonation towers, focusing on Solvay carbonation towers, sieve plate carbonation towers and composite sieve plate carbonation towers. The Solvay carbonation tower was used by the Belgian Solvay when he built the factory, and it is still used as a standard ...

AI Technical Summary

Problems solved by technology

The height of the tower is generally 25-28 meters, and the maximum diameter of the tower is 3.2 meters. This kind of tower crosses and carries out various processes. So far, the correlation formula of the reaction rate has not been derived and designed accordingly, but can only be based on some experience.

[0005] 2. Accumulation of scars and blockage, the inner wall of the tower and the bacterial cap, and the outer wall of the cooling water pipe are easy to encounter sodium bicarbonate scarring, which makes the channels in each tower ring narrow and forms cavities everywhere in the tower. Only by stopping Production and cleaning, so the equipment usage time is shortened, and the production efficiency of the tower is low

In this case, the renewal of the surface of the liquid film is relatively slow, and the reaction proceeds in a liquid state, so it is difficult for crystal particles to grow, and there is no condition for them to grow coarse. Long-term production practice has proved that this carbonation tower can only produce particles Less than 100μm, specific gravity 0.8, needle-shaped crystal

[0007] 4. Difficult to control

[0011] When carrying out specific control, its general principles are: firstly, the reaction speed cannot be considered only regardless of the time required for the normal growth of crystal nuclei, thereby reducing the crystallization particle size, resulting in deterioration of filtration and calcination conditions; The necessary residence time of carbonated ammonia brine, thereby reducing the conversion rate of sodium chloride, while increasing the consumption of various materials and energy

Images