Predictive control-based biogas system and stable gas supply method thereof

Abstract

The invention relates to a predictive control-based biogas system and a stable gas supply method thereof. The highly reliable system comprises a fermentation tank, a residue liquid storage tank, a manure storage tank, a material bin, a gas storage tank, a power supply management module and a thermoelectric combined unit. The manure storage tank communicates with the fermentation tank, the fermentation tank communicates with the residue liquid storage tank, a stirring device, a liquid level sensor, a temperature sensor, a pH sensor and a concentration sensor are arranged in the fermentation tank, and a pressure sensor and a gas component sensor are arranged in the gas storage tank. The stable gas supply method comprises the following steps: 1, acquiring fermentation parameters; 2, acquiring biogas parameters; 3, training a sample; and 4, controlling the gas supply by a stabilizer. The biogas system and the control method, which adopt predictive control parameter combined traditional PID control, have the advantages of low construction cost, high biogas output, high biogas utilization rate, significant beneficial effects, and suitableness for being applied and promoted.

Description

technical field [0001] The present invention relates to a biogas system based on predictive control and its stable gas supply method, more specifically, to a biogas system with simple and reasonable structure, high biogas production rate and stable biogas production and the combination of predictive control and PID control stable gas supply method. Background technique [0002] Improper disposal of livestock and poultry manure, sick and dead livestock and poultry, crop straw and other wastes will cause environmental pollution, breeding of germs, waste of resources and other issues, and become a hot spot of concern to the government and residents. Now many places have established regional waste resource utilization demonstration bases, regional ecological circular agriculture demonstrations centered on regional agricultural waste resource utilization, new rural biogas utilization, and comprehensive utilization of biogas slurry and biogas residue, to solve the problem of regio...

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Problems solved by technology

But on the other hand, the popularity of the control algorithm also reflects the limitations of the PID controller in terms of control quality. PID control is more suitable for single-input and single-output minimum phase systems, and can only determine a few main zero-pole points of the closed-loop system. , making it impossible to effectively realize automatic management and stable and orderly work in the large-scale biogas supply control process

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