A system and working method for comprehensive energy complementary utilization in rural areas

Abstract

The invention discloses a comprehensive energy complementary utilization system and working method in rural areas. The system includes a biomass unit part, a geothermal energy utilization part and a biogas utilization part, and realizes the cogeneration complementarity of biomass, geothermal energy and biogas through energy cascade utilization integrated. Organic biomass is burned in a direct-fired biomass boiler or fermented in an anaerobic reaction tank. The geothermal circulating water that absorbs heat and heats up from the middle and shallow soil is divided into two channels, one is used to heat the organic Rankine cycle working fluid and then used as the cylinder liner cooling water of the internal combustion engine; the other is used to heat the low-pressure feed water of the biomass unit and then used as exhaust water Insulation water for the oxygen reaction tank. The circulating water of the heat network is supplied to heat users after being heated by the exhaust gas of the internal combustion engine in the heat network heater. By rationally coupling biomass, geothermal energy and biogas, the invention realizes cascaded utilization of energy and reasonable recovery of waste heat, promotes local acquisition and efficient consumption of renewable energy in rural areas, and meets residents' heat and power needs according to local conditions.

Description

technical field [0001] The invention relates to the field of comprehensive energy utilization, in particular to a comprehensive energy complementary utilization system and a working method in rural areas, in particular to an energy system for coupled utilization of biomass, geothermal and biogas in rural areas to supply heat and electricity. Background technique [0002] With the continuous development of the rural economy, agricultural production and handicraft workshops have gradually become large-scale and industrialized, the energy load has been soaring, and the demand for electricity and heat has grown rapidly. However, the energy utilization system in rural areas needs to be further improved. [0003] The diversified development of renewable energy. In rural areas and remote mountainous areas with inconvenient transportation, the development and utilization of renewable energy in combination with local industrial characteristics and local conditions can not only improve...

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Problems solved by technology

[0004] Due to the intermittent and unstable utilization of solar energy and wind energy due to weather changes, considering the large proportion of the primary industry in rural areas, crop straw resources are very rich and have a high energy density. There are also rice straw, rice husk, corn husk, Organic combustibles such as firewood, and many areas are still open-air burning of agricultural and forestry organic matter, which not only causes waste of resources, but also brings environmental pollution

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