Transverse vacuum heat collecting pipe solar steam generating method and device

Abstract

The invention discloses a transverse vacuum heat collecting pipe solar steam generating method. A transverse vacuum heat collecting pipe solar steam generating device manufactured according to the method consists of a connecting device and a heat collecting pipe. The device is characterized in that: the heat collecting pipe is placed transversely; and the device comprises a multi-level water stop device communicated with the connecting device or the heat collecting pipe, and the water level state in the heat collecting pipe is changed together with the change of the state of the multi-level water stop device. The device has the advantages that: the heat collecting pipe is arranged horizontally, so that each part distributed along the axis has good working condition consistency; the heat transfer distance of an inner glass tube from a heating area to a water storage part is short; glass rather than a capillary material can be used for heat transfer, so that the problem of scaling of a capillary liquid absorbing material is avoided; the water stop device enables the water level state in each heat collecting pipe to be consistent when the connecting device is installed with an inclination angle along the axis; and by adopting a microcomputer control system, various complex functions can be realized, the performance of a two-phase stream heat exchange and collection device is greatly improved, and the device can be in seamless transition with a production process. An embodiment is provided by combining the drawing.

Description

technical field [0001] The invention relates to a method and a device for generating steam by solar energy with horizontal vacuum heat collecting tubes. Background technique [0002] The existing vacuum heat collecting tube has high heat collecting temperature, small heat loss, and high degree of industrialization, and the intubated water heater manufactured with it can provide domestic hot water above 50°C in winter. But in general, the application products of vacuum heat collecting tubes are not rich and developed enough. [0003] Chinese patent application 200910019948.0 discloses a solar distillation seawater desalination and raw water purification process: the raw water enters the heat collecting pipe through the condensation pipe and the water inlet valve; The sunlight evaporates the raw water in the heat collecting tube, and the steam rises to the condensation chamber to condense into water. The problems in the technical solution of this application are: the arrang...

AI Technical Summary

Problems solved by technology

The problems in the technical solution of this application are: the arrangement of the heat collecting tubes at an inclination angle leads to serious inconsistencies in the working conditions of the various parts of the heat collecting tubes along the axis, and it is inconvenient to take out the water in the heat collecting tubes; When the temperature difference between the tube and the cover glass tube is 100°C, the lengths of the two are inconsistent, and the resulting stress seriously deteriorates the working condition of the heat collecting tube.

The problems in the technical solution of this application are: the cost of the inner pipe and the condensation pipe is high; the method of filling the heat collecting pipe with seawater may not be suitable for industrial production of fresh water; and there is no solution for dealing with scaling and clogging of the wire mesh layer; Judging from the drawings in the manual: the inclination angle of the heat collecting tube facing the sun may be 40 degrees, which will lead to serious inconsistencies in the working conditions of each part of the heat collecting tube

A vacuum heat collecting tube with a length of 1.8 meters is used and the installation angle is more than 30 degrees. If the seawater in the inner tube is less than half, the part with a length of 0.9 meters and a vertical height of 0.45 meters above it will dry up due to the limitation of capillary action, making a considerable part of it dry. The production capacity is empty; if the inner tube is filled too much or the inclination of the heat collecting tube is close to the level, the undegassed sea water will rush into the condenser tube when boiling, so that the distilled water will be mixed with concentrated sea water, making the work of the distiller meaningless

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