Method of preparing large particle ammonium hydrogen carbonate

Abstract

The present invention is a new process and technology for large granulation of ammonium bicarbonate. A novel gas distributor is adopted, which does not destroy the crystal, distributes the gas evenly, prevents blockage and has no resistance; improves the cooling water flow, makes the temperature of the tower more reasonable and suitable for the production of large particles, and saves water; improves the process flow, and the fine crystals that escape with the mother liquor can be kept at any time Directly return to the main tower to continue to grow, single main tower small cycle, reduce cycle load, save power The particle grows faster and the particle size is larger; choose a thickener to reduce crystal escape, the particle continues to grow larger, and prevents clogging; Modify The original index improves the traditional operation, the crystallization stays in the tower for a long time, and the crystallization growth process is long, so that the particle size increases significantly.

Description

technical field [0001] The invention belongs to the field of inorganic chemistry. Background technique [0002] Ammonium bicarbonate is a unique product in my country, its structure is: NH 4 HCO 3 , the generating principle is NH 3 and CO 2 Reaction generation, existing problems: ammonium bicarbonate crystals are fine and small, agglomerated, highly volatile, low ammonia utilization rate, blockage of equipment pipelines in the production process, resulting in low output, high consumption, and inconvenient fertilization. Contents of the invention [0003] The invention greatly changes the process of producing ammonium bicarbonate, so that the crystal particles of the product are enlarged, without agglomeration, without blocking equipment pipelines, increasing output, reducing consumption, reducing volatilization waste, high utilization rate, and convenient fertilization. Mainly made the following process improvement and equipment transformation. [0004] 1. Transform t...

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Problems solved by technology

[0002] Ammonium bicarbonate is a unique product in my country, its structure is: NH 4 HCO 3 , the generating principle is NH 3 and CO 2 Reaction generation, existing problems: ammonium bicarbonate crystals are small, agglomerated, highly volatile, low ammonia utilization rate, blockage of equipment pipelines in the production process, resulting in low output, high consumption, and inconvenient fertilization

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