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

A technology of concentrating heat collection and feedback control, applied in the field of solar energy and seawater desalination, can solve the problems of unstable and imperfect solar heat source, achieve reasonable changes in seawater temperature and flow rate, and reduce the effect of heat collection temperature changes

Active Publication Date: 2013-07-17
HANGZHOU DIANZI UNIV
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  • Description
  • Claims
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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

Method used

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

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Such as figure 1 As shown, the multi-stage flash evaporation process device based on feedback control for concentrating heat collection includes a solar heat collection system, a heat transfer system, a seawater desalination system, a feedback control system and a heat exchanger 24 .

[0023] Solar heat collection system, including multiple trough-type concentrating heat collectors 8, multiple vacuum glass heat-collecting tubes 9, trough-type concentrating heat collectors 8 have an independent and automatic function of tracking the sun, so as to ensure that sunlight can be concentrated through the trough The heat collector 8 is reflected and focused on the vacuum glass heat collecting tube 9, and multiple trough-type concentrating heat collectors 8 are connected in series on multiple vacuum glass heat collecting tubes 9, and multiple vacuum glass heat collecting...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/14C02F103/08
CPCY02A20/124Y02A20/142Y02A20/212
Inventor 刘光宇薛安克王建中邹洪波赖晓平
Owner HANGZHOU DIANZI UNIV
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