JPH0646545Y2 - Downflow solar collector used to evaporate water from waste liquor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a downflow type solar heat collecting apparatus used for evaporating water from a waste liquid.

For example, a solar heat collector used for concentrating the waste liquid, more specifically, a solar heat collector used for concentrating the waste liquid containing heavy metals and other harmful components to a high-concentration liquid or for drying and solidifying. It is related to the device.

[Prior art] -Treatment of factory waste liquid Even if the amount of toxic components contained is very small, it is required to handle the contained liquid under strict environmental standards.
Since effluents from factories often contain very small amounts of heavy metals and harmful substances, it is undeniable to treat such low-concentration waste liquids at high-concentration treatment facilities. Instead of a full-scale large-scale treatment facility, an inexpensive general-purpose evaporation treatment device that can perform treatment easily is needed.

・ Disposal of deteriorated mud generated from construction sites Deteriorated mud generated from foundation construction sites, etc. sometimes contains heavy metals.Thus, the normal disposal of mud is regulated by law, and the waste liquid contained must be treated by a specialized disposal company. I have to outsource. The processing cost to be paid by the client is extremely high.

[Problems to be solved by the invention] In order to reduce the concentration cost, it is important to reduce the capital investment cost and the maintenance cost, but in the case of the existing large-scale production equipment, the investment amount of these production equipment is still extremely large. There are still problems with profitability.

In the case of toxic waste liquid, the processing cost is high, so the client side often entrusts to a processing company who offers a cheap price, and there is a possibility that sloppy processing will be performed. The problem that waste liquid comes into contact with rainwater and penetrates into the ground to contaminate the surrounding environment has already occurred in various places, which is a serious social problem. On the other hand, with respect to processing performed under strict control, the cost is passed on to the processing price, and the burden on the client side is extremely large, which is becoming a serious problem for companies with a weak economic base.

What remains to be an important issue is what concrete measures should be taken in order to easily construct / use the processing equipment.

[Means for Solving the Problems] The downflow type solar heat collecting apparatus of the present invention configured in consideration of these problems uses a pair of beam-shaped supporting members which are horizontally arranged opposite to each other. Then, the translucent sheet material is arranged on the upper side and the heat receiving sheet material is arranged on the lower side, and both sheet materials are stretched in a loop between the supporting members to form a greenhouse space surrounded by the translucent sheet material and the heat receiving sheet material. Using the water absorbing layer formed on the exposed surface on the back side of the heat receiving sheet material, the waste liquid is supplied to the water absorbing layer from the waste liquid supplying means arranged above the water absorbing layer, while the rain installed above the heat receiving surface. A characteristic structure is used to prevent rainwater from entering the water absorption layer by using the cut portion.

[Operation] Since the cloth sheet itself is lightweight, it is very easy to secure a wide heat collecting area. Because it uses a membrane structure that stretches the cloth sheet between the support members to secure a greenhouse space,
The size / arrangement of the heat receiving surface / evaporating surface can be selected and set relatively freely. Further, this heat receiving surface / evaporating surface is flexibly deformed in response to an external load such as a wind pressure or a loaded load by absorbing the waste liquid, and can be self-supported as a mechanically stable membrane structure.

The waste liquid adsorbed on the cloth sheet rapidly rises in temperature, is actively evaporated from the back side of the heat receiving surface, and the waste liquid flowing down the cloth sheet is rapidly concentrated. It is also possible to further dry and solidify and remove the water absorbing layer itself for disposal if necessary.

The exposed surface on the back side of the heat-receiving sheet material, that is, the water absorbing layer is free from the risk of inflow of rainwater due to the rain cut portion provided on the upper portion.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[Example] FIG. 1 is a vertical cross-sectional view showing an example of a downflow type solar heat collecting apparatus used for evaporating water from waste liquid. In the illustrated heat collecting device, an upper light-transmitting sheet material 1 and a lower heat-receiving sheet material 2 are stretched between a pair of beam-shaped supporting members 6a and 6b, and the side portions are hermetically sealed so that a substantial greenhouse space 3 is formed. On the other hand, the waste liquid supply means 5 is provided above the exposed surface on the back side of the heat receiving sheet material 2. Through this waste liquid supply means 5, the waste liquid is made to flow down to the back surface of the heat receiving sheet material 2 to evaporate the water content, and excess waste liquid or concentrated waste liquid is recovered through a gutter provided at the bottom.

According to the illustrated heat collecting device, the support members 6a and 6b are part of a permanent structure, or part of a temporary structure is used as these support members.

As the sheet material, various fiber reinforced resin sheet materials can be used.

The heat receiving sheet material preferably has an appropriate water retention property, and the water absorbing layer 4 can be attached to the back surface of the heat receiving sheet material as illustrated. The water absorption layer 4 is used to store the waste liquid discharged from the waste liquid supply means 5 and to dry or concentrate the waste liquid. Further, the water absorption layer 4 can be removed and replaced with a new one while retaining the solid content remaining after evaporation.

[Advantage of the Invention] According to the configuration of the present invention, the heat collecting / evaporating performance of the heat collecting apparatus can be quantitatively grasped, and the heat collecting apparatus having a processing capacity meeting the demand of the customer can be easily designed and manufactured. You can That is, by using a heat collecting device having an area where a heat collecting amount corresponding to the treatment amount is secured, a predetermined amount of waste liquid can be efficiently concentrated to a predetermined concentration within a desired treatment time range and solidified. The heat collecting device can be provided at a low cost.

According to the present invention, it is possible to significantly reduce the construction cost, equipment cost, operation cost, maintenance cost, etc. compared to the conventional one while securing the total heat collection amount or the waste liquid treatment capacity. It is possible to obtain a highly effective heat collector for treating wastewater.

[Brief description of drawings]

The drawings are longitudinal sectional views showing an example of a falling-type solar heat collecting apparatus according to the present invention. 1 ... Translucent sheet material 2 ... Heat receiving sheet material 3 ... Greenhouse space 4 ... Water absorption layer 5 ... Waste liquid supply means 6a, 6b ... Support member

Claims (1)

[Scope of utility model registration request] 1. A pair of beam-shaped support members which are arranged laterally opposite to each other and have a height difference, and a transparent sheet material is arranged on the upper side and a heat-receiving sheet material is arranged on the lower side. To form a greenhouse space surrounded by a translucent sheet material and a heat receiving sheet material between the supporting members in a loop shape, and utilizing the water absorbing layer provided on the exposed surface on the back side of the heat receiving sheet material, While supplying the waste liquid to the water absorption layer from the waste liquid supply unit located at the upper position, the rain drainer installed above the heat receiving surface was used to prevent rain water from mixing into the water absorption layer. Flow-down type solar heat collector used to drive.