Solar-energy sea water desalting equipment

Abstract

The solar-energy sea water desalting equipment can heat the heat conducting medium to required high temperature while ensure required heat conducting medium flow rate. The equipment includes a high-temperature heat collector to collect solar energy and heat the heat conducting medium and with heat conducting medium inlet pipe and outlet pipe; a steam boiler to produce high temperature steam usingthe high temperature heat conducting medium; and a multieffect distiller to distill sea water to produce fresh water. It is characterized by the high-temperature heat collector comprising several parallelly connected heat collecting devices connected between the heat conducting medium inlet and outlet pipes, and each heat collecting device comprising several heat collecting units with several high temperature heat collecting pipes serially connected.

Description

technical field [0001] The invention relates to a solar-powered seawater desalination device, in particular to a solar-powered high-temperature heat-collecting steam boiler multi-effect distillation seawater desalination device. Background technique [0002] Chinese invention patent application CN94113407.5 discloses a solar cascade sequential flash seawater desalination device, which consists of a solar water heater, a heat exchanger, a cascade flash fresh water generator composed of multiple flash single tubes, a circulation pump and a fresh water storage tanks etc. Wherein the solar water heater is composed of a plurality of vacuum heat absorbing tubes connected side by side and connected in series with circular arc reflectors. Since a plurality of vacuum heat absorbing tubes need to be connected side by side to form a serpentine shape, the heat transfer medium can be heated to the required temperature, but too long serpentine tubes will seriously hinder the flow of the ...

AI Technical Summary

Problems solved by technology

Since a plurality of vacuum heat absorbing tubes need to be connected side by side to form a serpentine shape, the heat transfer medium can be heated to the required temperature, but too long serpentine tubes will seriously hinder the flow of the heat transfer medium and reduce the flow rate. This causes the efficiency of the solar water heater to decrease

However, if the series length of the heat-absorbing pipes is shortened or the diameter of the heat-absorbing pipes is increased in order to improve the flow of the heat-conducting medium, the temperature of the heat-conducting medium output will be too low, which will reduce the efficiency of seawater desalination.

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