System and method for realizing cogeneration by using heat-conducting oil furnace and semiconductor power generation device

Abstract

The invention relates to a system and a method for realizing cogeneration by using a heat-conducting oil furnace and a semiconductor power generation device. The system comprises the heat-conducting oil furnace and a semiconductor temperature difference power generation device connected with the heat-conducting oil furnace through an oil supply pipeline; an oil-gas separator is connected with thesemiconductor temperature difference power generation device through a high temperature heat exchanger; a filter is connected with the heat-conducting oil furnace through a hot oil pump; a standby hot oil pump at the low temperature end is connected with a low temperature heat exchanger; a high-position expansion slot is connected with the oil-gas separator; a low temperature oil storage slot is connected with the oil-gas separator; in a phase-change working medium condenser of a power generation module, an indirect heat exchange mode is adopted, and cold fluid is used as a cooling medium forcooling phase-change working medium steam; and the cold fluid is heated and sent into a subsequent section, so the cogeneration is realized. The invention has the advantages that: high-grade heat energy is recycled and used, and the cogeneration is realized at the same time; moreover, as rotating equipment is absent in the semiconductor temperature difference power generation device, the system is secure and reliable; meanwhile, an aim that heat-conducting oil furnaces at the same temperature supply heat-conducting oil at different temperatures can be fulfilled.

Description

technical field [0001] The invention relates to a system and method for realizing cogeneration of heat and electricity by using a heat-conducting oil furnace and a semiconductor power generation device. It uses a semiconductor thermoelectric power generation device as a temperature adjustment device to solve the problem of supplying heat-conducting oil at different temperatures while generating electricity, and at the same time can co-produce Steam or hot water is used for heating users, and belongs to the technical field of combined heat and power generation of boilers. Background technique [0002] As a special boiler, heat-conducting oil furnace uses heat-conducting oil as a heat carrier for heating, and is widely used in actual production. Due to the needs of process production and the different heat consumption of each heat-using equipment, the temperature requirements of the heat-conducting oil are also different. Therefore, the heat-conducting oil heating station supp...

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Problems solved by technology

However, this technology has certain disadvantages: that is, the cooling source of the semiconductor thermoelectric generator needs to use a large amount of cooling water, and the heat taken away by the cooling water can only be recycled after being dissipated by the cooling tower, and the circulation of the cooling water requires a certain amount of electric energy

However, this technology also has problems: since the heat on the cold end surface of the semiconductor thermoelectric power generation module cannot be recycled and can only be lost to the atmosphere, this technology limits the boiling point of the cooling liquid to less than 100°C; inside the evaporator of the cold end surface of the power generation module The cavity is a cuboid, which is not filled with cooling liquid. The cooling liquid that absorbs the heat of the power generation module will inevitably entrain the cooling liquid when it is vaporized, so that it will contact the thin fins at the atmospheric end of the cuboid cavity to absorb heat and gasify, and the gasification of the absorbed heat The gas will exchange heat with the cooling liquid, but the cooling liquid is partially vaporized, and the latent heat of vaporization of the cooling liquid is not fully utilized by the cold end face of the power generation module.

Moreover, the internal cavity of the evaporator is a cuboid, and the gas and liquid coexist, and the volume will increase.

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