A solar energy film distillation system combining heat pump technology

A technology of solar film and distillation system, applied in heat recovery system, film technology, total evaporation, etc., can solve the problems of high energy consumption and operating cost, high overall energy consumption, improve heat energy utilization efficiency, high system integration, Easy to clean and replace

Active Publication Date: 2018-10-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem that restricts the further development of this technology is that when there is no industrial waste heat as a heat source to heat the raw material liquid, the use of traditional electric heating will lead to excessive energy consumption and operating costs in the membrane distillation process
In addition, the device still needs to heat the raw water through electric heating, so the overall energy consumption is still high

Method used

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  • A solar energy film distillation system combining heat pump technology
  • A solar energy film distillation system combining heat pump technology
  • A solar energy film distillation system combining heat pump technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Most areas in my country belong to category 3 and above sunshine areas (areas where solar energy can be utilized), and the annual sunshine hours are more than 2,000 hours. Therefore, the heat pump-solar membrane distillation system has broad application prospects, especially in areas where fresh water resources are scarce but brackish water is abundant, and the system can be used to prepare drinking water and domestic water. In addition, the heat pump-solar membrane distillation system is used to treat industrial high-salt wastewater. The produced water can be used as circulating water and industrial water, and the concentrated concentrated water can enter the evaporation and crystallization unit to meet the treatment requirements for near-zero discharge of high-salt wastewater. .

[0057] In a city in my country's Type 3 sunshine area, under typical sunny weather conditions in summer. The intensity of solar radiation gradually increases from 8:00 a.m. to the strongest...

Embodiment 2

[0065] In a city in the third type of sunshine area in my country, under the typical cloudy weather in summer. The solar radiation intensity is very low, and the total daily solar radiation is less than 8MJ m 2 d -1 . The outdoor ambient temperature is between 30-34°C.

[0066] The water temperature in the water tank 18 varies with the intensity of solar radiation, and the temperature range is between 50-60°C. At this time, it is necessary to use the electric heating rod 17 to auxiliary heat the raw water. Use reverse osmosis concentrated water with a conductance of 80000μs / cm as the raw water, and when the temperature of the raw water rises to 80°C, the flow rate of the raw water in the raw water tank 31 is controlled by the rotameter 44 to be 250L·h -1 , the temperature of the raw material liquid before entering the evaporation zone is between 70 and 80 °C, and the continuous operation is 12 hours a day, and the maximum membrane flux obtained is 32L m -2 h -1 , with an...

Embodiment 3

[0071] In a city in the third type of sunshine area in my country, it is a typical summer night. The outdoor ambient temperature is between 26-29°C.

[0072] It is necessary to use the electric heating rod 17 to heat the raw water at night. Use reverse osmosis concentrated water with a conductance of 80000μs / cm as the raw water, and when the temperature of the raw water rises to 80°C, the flow rate of the raw water in the raw water tank 31 is controlled by the rotameter 44 to be 250L·h -1 , the temperature of the raw material liquid before entering the evaporation zone is between 75 and 80°C, and the maximum membrane flux obtained is 32L m after continuous operation for 10 hours -2 h -1 , with an average membrane flux of 30.1L m -2 h -1 ; The conductivity of the product water is maintained at 130-200μS·cm -1 Around, the desalination rate is higher than 99.6%. The use of the heat pump greatly reduces the turn-on frequency of the electric heating rod 17, and the calculated...

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Abstract

The invention discloses a solar energy film distillation system combining heat pump technology, and is aim at utilizing a solar energy heat-collecting device to heat the raw water to reach the purposethat the energy consumption of the film distillation process is reduced as a whole. The full recovery of water vapor heat of transformation is realized by the application of the heat pump in the system, and the heat efficiency of the process is improved. Especially in the condition that auxiliary heating is performed by utilizing an electric heating rod in need, the energy saving effect that theheat pump can achieve is more obvious. The film distillation component and an evaporator of the heat pump system can be organically integrated by the heat pump-solar energy film distillation device, the integration level of the system is improved, and the operation flow is simplified and the other running costs are reduced.

Description

technical field [0001] The invention relates to a solar membrane distillation system, in particular to the use of solar vacuum heat collecting tubes to heat raw material liquid, combined with heat pump technology to fully recover the phase change heat of water vapor, to supplement the heat required to maintain the temperature of raw material liquid, and to make membrane distillation The whole process achieves the effect of saving energy and reducing consumption. Background technique [0002] Solar energy is an inexhaustible and easy-to-obtain renewable green energy. At present, relevant research on how to effectively utilize solar energy has become a hot spot in academic and industrial circles. As the most basic and direct application of solar energy, the use of solar energy to heat water and obtain the hot water needed for daily life has been mastered by human beings for a long time. With the advancement of material science and technology, more and more different forms of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/44C02F1/14B01D61/36B01D65/02
CPCB01D61/364B01D61/366B01D65/02B01D2321/162B01D2321/164C02F1/14C02F1/447Y02B30/52Y02A20/212
Inventor 郭智张新妙栾金义章晨林
Owner CHINA PETROLEUM & CHEM CORP
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