Cooling, heating, water supplying and power supplying combined system with flue gas heat gradient utilization function coupled with seawater desalination technology

Abstract

The invention discloses a cooling, heating, water supplying and power supplying combined system with a flue gas heat gradient utilization function coupled with a seawater desalination technology. The cooling, heating, water supplying and power supplying combined system comprises a gas turbine generator set, a hybrid heat source double-effect lithium bromide system, a seawater desalination evaporator, a primary preheater, a secondary preheater and a low-level water tank; an exhaust outlet of a gas turbine is connected with a flue gas inlet of the seawater desalination evaporator; a flue gas outlet of the evaporator penetrates through a high pressure generator of a lithium bromide unit via a pipeline and is connected with a flue gas outlet of the lithium bromide unit, a steam outlet of the evaporator is divided into two pipelines, one pipeline of the steam outlet of the evaporator penetrates through a low pressure generator of the lithium bromide unit, and the other pipeline of the steam outlet of the evaporator penetrates through a first heat exchanger of the hybrid heat source double-effect lithium bromide system to be communicated with the low-level water tank; and a condensate outlet of the lithium bromide unit is connected with the low-level water tank, and the flue gas outlet of the lithium bromide unit penetrates through the secondary preheater via a pipeline and then exhausts flue gas to an environment. The cooling, heating, water supplying and power supplying combined system has the advantages that a flue gas waste heat utilization rate and an energy utilization rate of devices are high, the cooling, heating, water supplying and power supplying combined system is applicable to running under different working conditions, a cooling load, a heating load and a power load can be matched with one another easily, and the like.

Description

technical field [0001] The invention belongs to the category of seawater desalination technology and distributed energy technology, and in particular relates to a quadruple power supply system of cold, hot water and electricity coupled with seawater desalination technology by cascade utilization of flue gas heat energy. Background technique [0002] In today's increasingly scarce energy supply, the rational use of energy and the improvement of energy utilization have become a common concern of all countries in the world. The combined cooling, heating and power supply system is an important technical means to realize cascaded utilization of energy and improve the utilization rate of primary energy. The development and utilization of combined cooling, heating and power technologies are in the ascendant in countries all over the world. The heat provided by the heating system in the combined cooling, heating and power supply system mainly comes from the high-temperature exhaust ...

AI Technical Summary

Problems solved by technology

However, at that time, problems such as the coupling method between the new seawater desalination device and the external heating system in practical applications, the latent heat of vaporization of water vapor and the recovery and utilization of waste heat of hot dense seawater were not considered.

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