Cascade heat pump steam curing system for precast concrete component and operation method of cascade heat pump steam curing system

Abstract

The invention discloses a cascade heat pump steam curing system for a precast concrete component and an operation method of the cascade heat pump steam curing system. A low-temperature heat pump unitof the cascade heat pump steam curing system comprises a low-temperature part condenser, a refrigerant three-way valve, a low-temperature part compressor, a low-temperature part evaporator, a low-temperature part throttle valve, a condensation evaporator and a low-temperature evaporator fan, a high-temperature heat pump unit comprises a high-temperature part compressor, a condensation evaporator,a high-temperature part throttle valve and a high-temperature part condenser, an air heating unit comprises a low-temperature part condenser, a low-temperature part condenser fan, a water heating coiland an air duct arranged in a steam curing chamber, and a steam generation unit comprises a pump, a high-temperature partial condenser, a waterway three-way valve and an electric heater. According tothe cascade heat pump steam curing system for the precast concrete component and the operation method of the cascade heat pump steam curing system, by utilizing the characteristics of cleanness, highefficiency, low operating cost and the like of a heat pump system, the problems of environmental pollution caused by a coal-fired boiler and a biomass boiler, high energy consumption of an electric boiler and the like are effectively solved.

Description

technical field [0001] The invention relates to a cascade heat pump steam curing system for concrete prefabricated components and an operation method thereof, belonging to the technical field of heat pumps. Background technique [0002] Prefabricated concrete components are widely used because they are conducive to engineering standardization, process-based construction, and convenient installation on the construction site. Concrete curing is an important process in the production of prefabricated components. The curing process is generally to rise from room temperature to 45~60°C within 5 hours, then keep warm for about 30 hours, and then cool down to room temperature after 5 hours. The process requires humidity above 70%. During the curing process, it is necessary to adjust and control the temperature rise rate, holding time, and constant high humidity, otherwise the strength and quality of the components will be directly affected. [0003] At present, small coal-fired bo...

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Problems solved by technology

Coal-fired boilers and biomass boilers are easy to install and use, low in cost, but poor in safety. At the same time, with the increasing smog weather and environmental governance requirements, this method is gradually restricted and eliminated; electric boilers generate steam through electric heating for maintenance. Although this method does not have a direct impact on the environment, it has high operating costs and poor economic benefits.

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