Micro-interface reinforced combined alkali production device and production method

Abstract

The invention provides a micro-interface reinforced combined alkali production device. The production device comprises a carbonization tower, one side of the carbonization tower is provided with a gas inlet and a liquid inlet, the carbonization tower is internally provided with a composite micro-interface generator, the gas inlet is communicated with the composite micro-interface generator to crush and disperse incoming gas, the liquid inlet is communicated with an AII liquid storage tank for providing AII liquid for the carbonization tower, and the composite micro-interface generator is immersed below the liquid level in the carbonization tower so as to enable the AII liquid to serve as a liquid phase medium of the composite micro-interface generator. According to the device, the composite micro-interface generator is arranged in the carbonization tower, incoming gas is crushed and dispersed into micro-bubbles, the phase boundary mass transfer area of the gas and AII liquid is increased, gas with low CO2 concentration can be used, the occupied area of equipment is reduced, the reaction temperature and pressure are reduced, and the cost is saved.

Description

technical field [0001] The invention relates to the field of soda production by a carbonization tower, in particular to a device and a production method for micro-interface strengthening combined soda production. Background technique [0002] In the soda joint enterprise, carbonized liquid (AII) is used to make alkali, wherein the carbonized liquid contains many components, and the molecular state is: H 2 O.CO 2 、H 2 CO 3 , NH 3 , NH 4 OH, (NH 4 ) 2 CO 3 , NH 4 HCO 3 , NH 4 COONH 2 , NaCl, Na 2 CO 3 , NaHCO 3 , NH 4 Cl, etc.; in ionic state: H + , OH - 、HCO 3 - , CO 3 2- , NH 2 COO - , NH 4 + 、Na + , Cl - , SO 4 2- . Carbonation reaction is a complex chemical reaction process including absorption, crystallization and heat transfer. Its reaction mechanism is complex and inconclusive, mainly with (NH 4 ) 2 CO 3 as intermediates and NH 4 COONH 2 There are two theories for intermediate products. NH 4 COONH 2 Take the theory of intermediate ...

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Problems solved by technology

In this way, the CO in the existing carbonization tower 2 The absorption strength is very limited

[0012] (3) CO in the tail gas of the carbonization tower 2 The content is high, and the bottom air intake needs to be pressurized to 0.35MPa, and the equipment investment and power consumption are high

In addition, in the existing process, the carbon dioxide concentration in the bottom air intake is required to reach more than 85%, so that the gas with a lower carbon dioxide concentration (75%) cannot be utilized

[0013] (4) The material of the carbonization tower is cast iron, the corrosion resistance needs to be improved urgently, and the automation control level of the overall device is low

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