Combined cooling, heating and power waste incineration waste heat utilization device and method

Abstract

The invention provides a combined cooling, heating and power waste incineration waste heat utilization device and method. The combined cooling, heating and power waste incineration waste heat utilization device comprises a waste incinerator, wherein the waste incinerator is provided with a household waste inlet and an air inlet; the waste incinerator is provided with a high-temperature flue gas outlet and a high-temperature slag outlet, and the high-temperature slag outlet and the high-temperature flue gas outlet are both connected to a steam Rankine cycle system; a low-temperature gas outlet formed in the steam Rankine cycle system is connected with a gas inlet of an organic Rankine cycle system; a waste heat outlet of the steam Rankine cycle system and a waste heat outlet of the organic Rankine cycle system are further connected with a heat exchange unit used for conducting heat exchange on heat supply network return water; and a low-temperature gas outlet of the heat exchange unit is connected with refrigeration equipment. According to the invention, heat in slag and flue gas at the bottom of the incinerator of the waste incineration power plant is recycled through a multi-stage heat recycling unit, then power is generated through the steam Rankine cycle and the organic Rankine cycle, and the output power of the waste incineration power plant is improved.

Description

technical field [0001] The invention belongs to the field of waste incineration power generation, and in particular relates to a waste incineration waste heat utilization device and method for combined cooling, heating and power supply. Background technique [0002] Landfill used to be the main way to dispose of waste. Its advantages are simple operation and low cost. The disadvantage is that it occupies a large area. In the long run, the landfill leachate generated during the landfill process is difficult to handle, which will cause land in the area And groundwater resources are polluted, and with the advancement of urbanization, landfills are under increasing pressure. [0003] Waste incineration power generation is to release the chemical energy stored in domestic waste through incineration, convert it into heat energy and use it. Compared with landfill, the emission of polluting gases from waste incineration is much lower. At the same time, the electricity and heat gene...

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Problems solved by technology

[0005] The object of the present invention is to provide a waste incineration waste heat utilization device and method for combined cooling, heating and power supply, which solves the problem that the heat in the slag at the bottom of the incinerator in a waste incineration power plant has not been utilized in the prior art, but only the heat in the flue gas has been used. Waste heat, and the existing waste incinerators are generally used for power supply, which cannot provide cooling and heating

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