System for recovering both heat and pure water and application method thereof

Abstract

The invention discloses a system for recovering both heat and pure water and an application method thereof. The system comprises a hot solution storage tank, a low temperature solution collection tank, a plurality of membrane components, a heat and pure water collection and storage tank and a circulating cooling water storage tank. The method comprises the following steps of: (1) allowing hot solution to enter the hot solution storage tank and storing the hot solution; (2) delivering the hot solution stored in the hot solution storage tank into the low temperature solution collection tank to be collected through tube passes of the membrane components; (3) feeding the cold water in the circulating cooling water storage tank into the heat and pure water collection and storage tank through shell passes of the membrane components; and (4) performing the steps (2) and (3) simultaneously to recover both the heat and the pure water. In the invention, the latent heat transfer of the vapor with the vapor mass transfer function between membranes is used as a beneficial enhanced mode for heat exchange between cold fluid and hot fluid. Meanwhile, the recovery of the pure water is realized, and the heat exchange efficiency of the system is high due to the latent heat transfer function of the vapor; and because the membrane material belongs to organic high molecular materials and can provide a huge contact area so as to ensure small volume and weight of the device and better energy conservation of the system.

Description

technical field [0001] The invention belongs to the fields of energy saving and emission reduction, energy application and membrane distillation technology application, and relates to a heat and water recovery method and a heat and mass transfer process in the membrane distillation technology, in particular to a method and device for double recovery of heat and pure water. Background technique [0002] Energy saving, emission reduction and sustainable development are one of the important issues in our country's national economic and social development. In its implementation process, an important measure is to actively promote the adjustment of energy structure, vigorously develop renewable energy, and promote the scientific research, development and construction. Another important measure is to vigorously promote scientific and technological innovation, strengthen energy conservation, improve energy utilization efficiency, and reduce energy waste and environmental pollution...

AI Technical Summary

Problems solved by technology

[0004] Since waste hot water and waste hot water in industry are low-grade heat sources, metal heat exchangers with small temperature differences are required to recover their heat. Therefore, the heat exchange area of ​​the heat exchanger is generally large, and the large heat exchange area means The large volume and weight of the heat exchanger also means that the initial investment of the heat exchanger is large

At the same time, the heat exchanger with small temperature difference makes the heat recovery efficiency impossible

Secondly, due to the use of independent processes for heat recovery and water recovery, the system has a large number of equipment and the process is lengthy and complicated

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