Method and system for combined supply of cooling, heating and power through small biomass gasification

Abstract

The invention discloses a method and a system for combined supply of cooling, heating and power through small biomass gasification. The method comprises the following steps: feeding high-temperature crude biomass gasified gas generated in a biomass gasification furnace into a heat pipe type gas-liquid heat exchanger for utilizing sensible heat, wherein the temperature after heat exchange through the heat pipe type gas-liquid heat exchanger is 200 DEG C; purifying the crude gasified gas after the heat exchange; feeding one part of the purified biomass gasified gas into an internal combustion engine for combustion for power generation, and taking the other part of the purified biomass gasified gas as supplementary fuel of a hot water flue gas direct-fired machine; arranging a temperature sensor behind the heat pipe type gas-liquid heat exchanger, controlling the motor speed of a fan and a spiral blade type feeding device through a temperature control system based on the temperature to adjust the balance between the gas consumption and the gas yield, and accurately controlling the temperature of the biomass gasified gas to be 200 DEG C. The system is reasonable in configuration, the effect of medium and low-temperature waste heat can be brought into full play, the gradient utilization rule of energy is realized, and the energy utilization rate of the system is increased.

Description

technical field [0001] The invention relates to a small-scale biomass gasification combined cooling, heating and power supply method and system that can significantly improve the energy comprehensive utilization rate of the combined cooling, heating and power supply system. Background technique [0002] Biomass energy is the solar energy converted and stored by green plants through photosynthesis, and is an important renewable energy source. In recent years, in order to cope with challenges such as the contradiction between energy supply and demand and global climate change, biomass energy, as an alternative to fossil energy, has received more and more attention. Countries around the world regard the development of biomass energy as an important strategic measure to ensure energy security, and actively promote the development and utilization of biomass energy. Biomass gasification is a way of efficient and clean utilization of biomass energy. It refers to the process of usi...

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Problems solved by technology

This system has achieved cascade utilization of energy to a certain extent, but there is still a problem of energy waste --- the temperature of the hot gasification gas from the biomass gasifier is 300~400℃ or even higher, but it has not been effectively utilized , if this part of energy can be utilized, not only can the energy utilization rate of the system be improved, but also the gas can be cooled for easy transportation

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