Sludge drying system of combined solar energy and multi-source heat pump

Abstract

The invention relates to a sludge drying system of combined solar energy and multi-coupled heat pump, belonging to the technical field of sludge drying. In order to improve energy utilization rate of solar energy sludge drying technology, the provided system comprises: a solar energy greenhouse subsystem comprising a greenhouse containment module, a base plate module and a gas diversion module, wherein the greenhouse containment module forms external framework of the greenhouse containment module, the base plate module carries to-be-dried sludge, and the gas diversion module introduces hot air from outside to the greenhouse subsystem and discharges moist air in the greenhouse subsystem; and a heat pump subsystem which is connected with the gas diversion module, and introduces hot air and dehumidifies discharged wet air of the greenhouse subsystem through the gas diversion module. The system uses the solar energy greenhouse to dry the sludge, is simple to maintain, high in reliability; the solar energy greenhouse cooperates with the heat pump subsystem to discharge wet air and introduce hot air, and thus the system is compact in structure; and the system uses a heat pump to heat and dehumidify, thereby improving energy utilization rate during the sludge drying process.

Description

technical field [0001] The invention belongs to the technical field of sludge drying and relates to a sludge drying system combined with solar energy and multi-heat source heat pumps. Background technique [0002] Sludge drying is an important part of municipal sewage treatment, and it is also a process that consumes a lot of energy. Reducing the moisture content of sludge through drying treatment can achieve the purpose of resource utilization, stabilization, reduction and harmlessness. At present, there is a technical idea of ​​using solar energy to dry sludge. Since abundant solar energy resources can be used free of charge, a large amount of conventional energy can be saved, which has great economic and environmental benefits. [0003] Among them, the main features of solar energy utilization include: [0004] (1) Universality: The sun shines all over the earth, no matter land or sea, no matter mountains or islands, it is everywhere, can be directly developed and utili...

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Problems solved by technology

In winter, it is roughly only half, and in cloudy days, it is generally only about 1 / 5, so the energy-flux density is very low;

[0010] (2) Instability: Due to the limitation of natural conditions such as day and night, season, geographical latitude and altitude, as well as the influence of random factors such as sunny, cloudy, cloud and rain, the solar irradiance reaching a certain ground is intermittent is extremely unstable, which increases the difficulty of large-scale application of solar energy

[0011] Based on the above reasons, it is precisely because of the shortcomings of solar energy such as low energy flow density, discontinuity, and strong weather influence, so only using solar energy cannot guarantee the completion of the required amount of sludge treatment within a period of time

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