Solar pond type solar sludge drying system and sludge drying method thereof

Abstract

The invention discloses a solar pond type solar sludge drying system and a sludge drying method thereof. The solar pond type solar sludge drying system comprises a solar pond module and a sludge drying module; the solar pond module comprises a solar pond heat storage and exchange part and a distribution control part; the solar pond heat storage and exchange part comprises a solar pond (1) which isused for absorbing sunlight and converting the sunlight into heat energy, a photovoltaic cell (2), a heat exchanger (3) and a phase change heat storage box (4); the phase change heat storage box (4)is used for storing excessive heat energy or outputting the heat energy outwards through the closing and opening of a first valve (18) or a second valve (19); and a sludge drying chamber (5) comprisesan air inlet (25) for inputting hot air produced by the heat exchanger (3) through an air blower (20), a sludge inlet (26) which is used for inputting sludge to be dried, an air outlet (27) which isused for exhausting the hot air, and a sludge outlet (28) which is used for discharging dried sludge.

Description

technical field [0001] The invention relates to the technical field of sludge drying, in particular to a solar pond solar sludge drying system and a sludge drying method thereof. Background technique [0002] Sludge refers to the mixture or colloid of solid and water produced in production and life and deposited in drainage pipes and channels. plastid. In recent years, with the improvement of people's living standards and the development of industry in our country, the total amount of sludge discharge is increasing. At present, the treatment methods of sludge are mainly sludge landfill, sludge composting, ocean disposal and other methods, which have a huge impact on the ecological environment. The so-called sludge drying is to reduce the water content of sludge from about 70% to below 30%, so as to adapt to the incineration or melting treatment of fluidized bed, which is the key technical factor of sludge treatment. At present, the main drying technology is thermal drying...

AI Technical Summary

Problems solved by technology

However, its utilization form is direct steaming and drying, the solar energy utilization efficiency is low, and the stability and reliability of the system are limited due to the influence of the weather, and the peculiar smell of sludge will also cause certain environmental pollution

However, the solar pool type solar energy utilization device, such as patent CN 105841365A, etc., fails to combine it with solar cells to achieve multi-level utilization of photoelectricity, light and heat; such as patent CN 202692209U, etc., the main difference from this patent is that the solar pool is not doped with nanometer Particles and the side walls are not inclined, resulting in low radiation absorption area and efficiency of the solar pool, and its absorption band overlaps more with the solar cell absorption band, resulting in low solar cell efficiency

[0005] The above patents all have problems such as insufficient utilization of solar energy and low efficiency of photoelectric-to-thermal conversion. For the overall consideration of the system, it is of great significance to improve the efficiency of solar energy conversion and achieve self-sufficiency in thermoelectricity.

Images