PROCESS AND APPARATUS FOR PRODUCING OF AMMONIUM BICARBONATE

摘要

PURPOSE: A manufacturing method of ammonium bicarbonate is provided to manufacture ammonium bicarbonate with a low cost using gas-liquid reaction of ammonia solution and carbon dioxide generated from coal gasification process. CONSTITUTION: A manufacturing method of ammonium bicarbonate comprises the following steps. Ammonia generated from coal gasification process is collected to be ammonia solution. Carbon dioxide generated from coal gasification process is collected and ammonium bicarbonate slurry containing ammonium bicarbonate salt and water is generated using gas-liquid reaction with ammonia solution. The ammonium bicarbonate salt is collected by separating liquid from ammonium bicarbonate slurry. And ammonium bicarbonate is transformed into a solid state. The concentration of ammonia solution is 5-30%. Molality concentration of carbon dioxide molality/molality concentration of ammonia is 0.25-1 in the gas-liquid reaction of step. Ammonium bicarbonate manufacturing device includes reactor, solid-liquid separator, and dehydrator. [Reference numerals] (AA) Coal; (BB) Oxygen(O_2); (CC) Steam(H_2O); (DD) Gasifier; (EE) Oxygen facility; (FF) Synthetic gas; (GG) High concentration ammonia solution; (HH) Liquid reaction; (II) Gas refining; (JJ) Ammonium bicarbonate production apparatus; (KK) Ammonium bicarbonate slurry; (LL) Solid-liquid separator; (MM) Supernatant; (NN) Dehydrator; (OO) Dehydrated filtrate; (PP) Solid ammonium bicarbonate; (QQ) Waste heat returning power generation; (RR) Methane synthesis; (SS) Synthetic natural gas; (TT) Concentrated ammonia solution; (UU) Ammonia concentrator; (VV) Wastewater