Ammonia-method carbon capture system based on ionic liquid refrigeration cycle

Abstract

The invention discloses an ammonia-method carbon capture system based on an ionic liquid refrigeration cycle. The system comprises parts such as an absorption tower, a rich liquid pump, a rich and poor liquid heat exchanger, a poor liquid pump, a desorption tower, an ammonia scrubber tower, an exchange exchanger, an ammonia desorption tower, a condenser, a throttle valve, an evaporator and an ammonia absorber, wherein a flue gas outlet in the upper part of the absorption tower is connected with the ammonia scrubber tower; the liquid outlet of the ammonia scrubber tower is connected with the liquid inlet of the ammonia desorption tower through the heat exchanger; meanwhile, the liquid outlet of the ammonia desorption tower is also connected with the liquid inlet of the ammonia scrubber tower through the heat exchanger; and the gas outlet of the ammonia gas desorption tower communicates with outlets of the condenser, the throttle valve, the evaporator and the evaporator in sequence and is connected with the ammonia absorber. By adopting the ammonia-method carbon capture system based on the ionic liquid refrigeration cycle, escaped ammonia is absorbed by using an ionic liquid to formrefrigeration medium pairs, a refrigeration cycle is achieved, and meanwhile, desorption of CO2 can be achieved.

Description

technical field [0001] The invention relates to the field of absorption refrigeration and greenhouse gas emission reduction, in particular to an ammonia-ionic liquid absorption refrigeration combined carbon capture system. Background technique [0002] Thermal power generation systems usually use fossil energy as fuel to obtain energy, and such a system will produce by-products mainly carbon dioxide. The greenhouse effect caused by excessive carbon dioxide emissions from energy consumption has attracted widespread attention from all over the world. Various technologies have been developed to remove CO from flue gas 2 , These technologies include film absorption method, frozen ammonia method, etc. These methods obviously increase the investment cost of equipment and increase the operation cost of equipment, which eventually leads to an increase in electricity cost. Existing ammonia-based carbon capture technology absorbs CO in ammonia water 2 During the process, a large am...

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Problems solved by technology

[0005] Aiming at the problem of ammonia escape caused by the current ammonia-based carbon capture system and the need to simplify the absorption refrigeration process, the present invention proposes an ammonia-based carbon capture system based on an ionic liquid refrigeration cycle, which combines the ammonia-based carbon capture system with The escaped ammonia is absorbed with ionic liquid, and ammonia and ionic liquid are used to form a working medium for absorption refrigeration. The ammonia used for refrigeration returns to the ammonia carbon capture system, realizing the recovery and utilization of escaped ammonia and solving the problem of carbon The problem of ammonia escape during the capture process, and also realize the output of cold energy

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