Five-tower one group type external cooling carbonization tower system and operation system thereof

Abstract

The invention relates to a five-tower one group type external cooling carbonization tower system which comprises five carbonization towers in parallel, wherein one carbonization tower functions as a cleaning tower and the other four carbonization towers function as alkali making towers in the operation process; three external coolers communicated with the interior of a tower body is arranged outside the tower body of each carbonization tower; a reaction liquid is circulated in a mode of natural circulation between the tower bodies and the external coolers; tail gas tubes for discharging tail gases to a tail gas processor are connected with the tops of the carbonization towers; an AII mother liquid and a carbon AII liquid are respectively fed into the carbonization towers from AII mother liquid tubes and carbon AII liquid inlet tubes at the upper parts of the carbonization towers; carbon dioxide and nitrogen are respectively fed into the carbonization towers from carbon dioxide gas tubes and nitrogen tubes at the lower parts of the carbonization towers; carbon AII liquid outlet tubes and alkali liquid discharge tubes for discharging the carbon AII liquid and the alkali liquid are connected with the lower parts of the carbonization towers. By adopting the system, the production capacity can be increased by 300 tons of sodium carbonate per day, and the investment cost of a companycan be greatly reduced.

Description

technical field [0001] The invention relates to an external cooling carbonization tower, in particular to a five-tower-one-group type external cooling carbonization tower and an operation method thereof. Background technique [0002] In the joint soda enterprise, ammonia, industrial salt, carbon dioxide, and water are used as raw materials to generate sodium bicarbonate and ammonium chloride in the carbonization tower, and sodium bicarbonate is calcined to generate sodium carbonate, which is soda ash. The basic chemical reaction is as follows: [0003] Main reaction NaCl+NH 3 +CO 2 +H2O=NaHCO 3 +NH 4 Cl+Q...(1) [0004] Side reaction NH 3 +CO 2 +H 2 O=NH 4 HCO 3 +Q...(2) [0005] From the perspective of chemical reaction speed and chemical reaction balance, the optimal operating point is selected by controlling appropriate process indicators to ensure the appropriate degree of progress of reaction (1). Obviously, the operation and control of the carbonization pro...

AI Technical Summary

Problems solved by technology

For the production demand of a larger amount of soda ash per tower group, the traditional grouping method of four towers cannot meet the requirements

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