Thermal energy utilization system

Abstract

The invention provides a thermal energy utilization system. The system comprises an evaporator, an expansion machine, a condenser, a preheater and an executing assembly, wherein a first port of the evaporator is used for being connected with a to-be-recovered heat source; a second port of the evaporator communicates with the inlet end of the expansion machine, so that a refrigerant medium pressurized by the evaporator is enabled to flow into the expansion machine; the outlet end of the expansion machine communicates with the inlet end of the condenser; the outlet end of the condenser communicates with the inlet end of the preheater, the outlet end of the preheater communicates with a third port of the evaporator, therefore, the refrigerant medium flows into the evaporator after passing through the preheater, and the evaporator, the expansion machine, the condenser, the preheater and the evaporator are sequentially connected to form a circulation loop; and an output shaft of the expansion machine is connected with the executing assembly, the executing assembly is driven to operate by the expansion machine and enabled to do external work, and the problem of low waste heat utilizationrate of a boiler in the prior art is solved.

Description

technical field [0001] The invention relates to the field of comprehensive utilization of heat sources, in particular to a heat energy utilization system. Background technique [0002] In industrial processes such as electric power production, coal-fired gas boilers are widely used. In order to control the salt concentration in the boiler water, when there are sediments in the boiler water, and the solid content in the boiler water is high, the sewage is often discharged through continuous sewage pipelines. In addition, thermal deaerators are also widely used in boilers. While the deaerator is working, it entrains a large amount of working steam and discharges it into the atmosphere. [0003] Although the sewage discharged from the boiler and the steam entrained by the deaerator contain a large amount of heat, the original thermal system will be changed during recycling, which may lead to potential safety hazards in the modified thermal system. In addition, due to the low q...

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a thermal energy utilization system to solve the problem of low utilization rate of boiler waste heat in the prior art

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