System and method for producing solid carbonate and the solid carbonate

Abstract

The invention provides a system for producing solid carbonate, which comprises a carbonization device, a gas input device, a liquid input device and a circulating device; the gas input device is usedfor inputting gas into the carbonization device, and the liquid input device is used for inputting liquid into the carbonization device; ammonia gas, carbon dioxide gas and liquid containing calcium ions and / or magnesium ions are subjected to gas-liquid mixing at the upper end in the carbonization device to form a gas-liquid mixture; and the circulating device is used for circularly conveying at least one of the carbonate solid, the incompletely reacted liquid and the incompletely reacted gas to the upper end of the carbonizing device again and enabling the same to enter the carbonizing devicefor circular reaction. The invention also provides a method for producing a carbonate solid and the carbonate. According to the system, the carbon dioxide gas, the ammonia gas and the liquid form a gas-liquid mixture in the carbonization device, and the gas-liquid mixture reacts in the movement process from top to bottom in the carbonization device, so that the reaction generation efficiency canbe improved.

Description

technical field [0001] The invention relates to the technical field of inorganic chemical industry, in particular to a system and method for producing solid carbonate, and solid carbonate. Background technique [0002] Ammonium nitrate calcium magnesium is an efficient and environmentally friendly green fertilizer, suitable for a variety of soils and crops, can loosen the soil, reduce the concentration of active aluminum, reduce the fixation of active phosphorus, improve the resistance of plants to diseases, and promote soil The activities of beneficial microorganisms in the soil can play a good role in soil properties and plants. Compared with the existing calcium magnesium nitrate fertilizer obtained by simple physical mixing, when ammonium calcium magnesium nitrate is used in the field of fertilizers, it is better than single calcium fertilizer, magnesium fertilizer or calcium magnesium nitrate fertilizer obtained by simple physical mixing. It has better effects on plant...

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Problems solved by technology

However, the existing process for preparing ammonium calcium magnesium nitrate from waste liquid does not fully utilize the waste liquid, which will generate a lot of waste residue, low raw material utilization rate, and cause certain harm to the environment, and the process is complicated, time-consuming, and costly. Not conducive to mass production

[0004] In addition, the common carbonization method of the existing ammonium nitrate calcium magnesium solution is ammonium carbonate solution, so it is necessary to react the tail gas and ammonia gas in the aqueous solution first, and then mix the ammonium carbonate solution with the ammonium calcium magnesium nitrate solution The reaction and operation are complicated, and the amount of water added in the carbonization process increases, which will increase the burden on post-processing and cause unnecessary waste, increasing production costs

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