Light-condensing and heat-collecting multistage flash evaporation process device based on feedback control

Abstract

The invention discloses a light-condensing and heat-collecting multistage flash evaporation process device based on feedback control. How to overcome the characteristic that a solar heat source is instable is not considered in the prior art. The light-condensing and heat-collecting multistage flash evaporation process device comprises a solar heat-collecting system, a heat transfer system, a seawater desalting system, a feedback control system and a heat exchanger; the heat transfer system constructs a closed heat transfer working medium circulating loop; the closed heat transfer working medium circulating loop allows a heat conducting working medium to repeatedly circulate; and a seawater desalting loop formed by the seawater desalting system is in an open structure and allows the seawater desalting system to continuously generate fresh water. Meanwhile, a feedback control loop is applied to the light-condensing and heat-collecting multistage flash evaporation process device disclosed by the invention; a flow temperature meter is used for measuring fluid and temperature signals in several pipelines and feeding back the signals to an industrial controller; and according to the feedback signals, the industrial controller generates a control command for adjusting the rotating speeds of each motor and each centrifugal pump. According to the light-condensing and heat-collecting multistage flash evaporation process device disclosed by the invention, adverse influence generated by solar fluctuation is overcome; and meanwhile, the utilization efficiency of heat energy is increased and energy saving and environment friendliness are realized.

Description

technical field [0001] The invention belongs to the technical field of solar energy and seawater desalination, and in particular relates to a feedback-controlled light-gathering and heat-collecting multi-stage flash evaporation process device. Background technique [0002] Mainstream seawater desalination processes include multi-effect distillation, multi-stage flash evaporation, reverse osmosis membrane, etc. These processes need to consume a lot of heat or electricity, and the common way to generate heat and electricity is the energy conversion of non-renewable energy, such as: the energy released by nuclear reactions , the energy released by burning coal, etc. As we all know, the consumption of fossil fuels such as coal and oil pollutes the environment and produces greenhouse gases, so that human beings not only face the pressure of further shortage of fossil fuels, but also bear the huge pressure of environmental degradation. [0003] Using solar energy to desalinate se...

AI Technical Summary

Problems solved by technology

However, such methods are still not perfect

The main reason is that people have not considered how to overcome the unstable characteristics of solar heat sources, which is contrary to the actual situation that the traditional seawater desalination process expects the system to be near a certain control operating point

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