Device for raising seedlings in geothermal agriculture with surface water source

Abstract

The invention relates to a device for an earth surface water source for agricultural seedling growth with terrestrial heat and a control method of the device. The device provided by the invention comprises an evaporator, a condenser, a compulsive circulation water pump, a ferro-manganese removal device and a seedling bed heat exchange tube. Due to reasonable pipeline design and valve control, the device provided by the invention is uniform and rapid in heat exchange of a seedling bed, moreover a whole heat exchange pipeline is relatively slight in scaling, and scale can be conveniently removed, so that the service life of a whole system can be prolonged, and temperature requirements for seedling growth can be ensured for a long time.

Description

technical field [0001] The invention relates to the field of agricultural heat supply, in particular to a device for using surface water sources for raising seedlings in geothermal agriculture. Background technique [0002] Surface water sources are rich in heat resources, which can be used to exchange heat with water in underground wells to benefit its thermal energy. Due to its environmental protection and higher energy efficiency than traditional heating methods, the research on its development and utilization is also increasing year by year. [0003] In the existing technology, it is rarely used in the constant temperature control of agricultural seedlings, mainly because the temperature changes in four seasons, but the heat demand for geothermal water is different. For example, underground well water needs to be heated in winter, while underground well water needs to be heated in summer. Water is used for heat dissipation, so a single geothermal utilization device can o...

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Problems solved by technology

[0003] In the existing technology, it is rarely used in the constant temperature control of agricultural seedlings, mainly because the temperature changes in four seasons, but the heat demand for geothermal water is different. For example, underground well water needs to be heated in winter, while underground well water needs to be heated in summer. Water for heat dissipation, so a single geothermal utilization equipment can only cool or heat in one direction, which is not easy to use

[0004] In addition, in the prior art, the utilization rate of the heat of underground well water in industry is still low, mainly because the heat exchange tubes are usually relatively large, with a nominal diameter of about 65mm, and the heat exchange efficiency is low

In addition, the service life of the geothermal system of the surface water source is short, and it is difficult to clean up, mainly because the surface water contains various minerals and microorganisms, and the impurity content is high, and the impurity components are different in different places, so each in the heat exchange system It is easy to form scale in the pipeline and cause blockage

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