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Decarbonizers

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Decarbonizers

PURPOSE

Decarbonizers are used for the elimination of free carbonic oxide dissolved in water, an abundance of which causes metal corrosion. The main aim of decarbonization is to achieve a carbon dioxide concentration close to the equilibrium point in the water-air system.

TECHNOLOGICAL PROCESS SCHEME

TECHNOLOGICAL PROCESS DESCRIPTION

The working principle of the decarbonizer involves using desorption process i.e. transformation of carbon dioxide dissolved in water from liquid into gas form. The amount of evolving gas largely depends on the surface of adjoining liquid and gas phases. The larger this surface is, the more effect the emission has.

Increasing the adjoining phases surface is performed using Raschig, Pall etc. ceramic rings in the decarbonizer which, due to their form (hollow thin-walled cylinder), have a larger working surface.

Most popular types of water decarbonizers are reverse-flow film apparatus with random packing, with high mass-exchanging efficiency and low operating costs.

This type decarbonizer works the following way: decarbonized water is supplied through intake connection to the top part of decarbonizer. Then in separate jets this water falls on packing made of ceramic rings. Spreading out over packing in thin film, water dashes down. The air counterflow supplied from below carries carbon dioxide evolved from water, which goes out through the upper connections. Decarbonized water goes out through the lower connection.

Direct flow spray-type decarbonizers differ from counterflow ones, in their smaller size and material consumption. The working principle is based on the creation of a high-speed flow of water drops in the ejector unit for providing water contact with a large amount of air. In this case, processed water is diffused by nozzles in the working zone ejecting air and providing a large surface of phase interaction. Carbon dioxide is desorbed from water in air, which is diffused into the atmosphere. Processed water is supplied to the accumulator.

Other types of decarbonizers are used more rarely.