Drying system and method using greenhouse combining industrial waste heat with solar energy

Abstract

The invention discloses a drying system and method using a greenhouse combining industrial waste heat with solar energy. On the basis of using solar energy to heat the greenhouse, the industrial wasteheat is utilized in multiple stages; high-temperature steam entering from a heating-network inlet condenses to release heat in a steam-air heater to become high-temperature hot water; after flowing into a steam condensate-water tank, the high-temperature hot water flows into a heating pipeline of a water-water heat exchanger I and a heating pipeline of a water-water heat exchanger II, heats a floor heating pipe under the ground of the greenhouse through the water-water heat exchanger I, heats an air heating coil in a fresh air pipeline through the water-water heat exchanger II, and finally flows out through a heating-network outlet; air heated by the steam-air heater is blown to a reticular to-be-dried-material storing platform in the greenhouse through an air supply fan; and heat in exhaust air is recovered through a waste heat recoverer and used for heating fresh air. Compared with the traditional drying system, the drying system achieves the multi-stage utilization of the industrial waste heat as well as the recovery of the heat in the exhaust heat.

Description

technical field [0001] The invention relates to an industrial waste heat composite solar greenhouse drying system and method, belonging to the fields of energy engineering and chemical engineering. Background technique [0002] At present, the recycling of solid waste has become a research hotspot in the field of energy and environment, and it is also the focus of urban development. [0003] The co-combustion of solid waste and coal in the boiler is a promising solid waste treatment technology, which has the advantages of recyclable energy, significant reduction of solid waste, and centralized and efficient treatment of pollutants. Solid waste such as biomass straw, urban sludge, and domestic wet garbage has been co-combusted with coal in boilers. [0004] However, due to the high water content of solid waste materials such as straw, urban sludge, and domestic wet garbage, the energy density is reduced, which affects the combustion performance of the boiler, and is not easy...

AI Technical Summary

Problems solved by technology

[0010] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides an industrial waste heat composite solar greenhouse drying system and method, which can be used to dry wet and solid waste materials, and can solve the problem that low-grade industrial waste heat cannot be effectively utilized and solar greenhouses Technical problems that cannot provide stable drying effect

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