Combined heat and power generation system capable of generating power by utilizing biomass in stepped manner

Abstract

The invention relates to a combined heat and power generation system capable of generating power by utilizing biomass in a stepped manner. The combined heat and power generation system comprises a raw material processing unit, a biomass pyrolysis and gasification unit, a straw carbon bin, a gas turbine power generation unit and a central control unit. The central control unit is arranged, a preset difference matrix d0, a preset rotating speed matrix W0 and a preset rotating speed adjusting parameter matrix wa0 are arranged in the central control unit, and when a cutter adopts Wi rotating speed to cut straw into straw blocks, a visual detector detects the average block diameter D of the straw blocks and compares D with the corresponding ith preset block diameter Di; the difference value d between the actual block diameter of the straw block and the preset block diameter is calculated, and the rotating speed of the cutter is adjusted by selecting the corresponding preset rotating speed adjusting parameter according to the comparison result, so that different kinds of straw can be effectively cut into straw blocks with the corresponding block diameters, and the pyrolysis efficiency of the straw blocks is improved; and the energy conversion efficiency of the system is improved.

Description

technical field [0001] The invention relates to the technical field of biomass power generation, in particular to a cogeneration system capable of stepwise utilization of biomass for power generation. Background technique [0002] Gas turbines, also known as aero engines, are the most advanced power machinery ever invented by human beings. The production of gas turbines is also an important symbol to measure the level of national science and technology. Compared with ordinary thermal power generation, the thermal and electrical energy efficiency of gas turbines is more than doubled, and PM2.5 emissions are greatly reduced. It is currently the best alternative way to cooperate with the national environmental protection policy of "replacing coal with gas and electricity" and eliminate the traditional coal-fired energy supply; combined heat and power supply is the best energy supply method to solve the production and life of the northern masses, which is beneficial to the countr...

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Problems solved by technology

[0007] To this end, the present invention provides a cogeneration system that can utilize biomass in stages to generate electricity, to overcome the inability to flexibly adjust processing parameters and pyrolysis parameters based on factors such as the actual type of straw and water content in the prior art, resulting in energy conversion efficiency low problem

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