Experimental device for reducing nano bubbles on coal surface and improving biological gas production and working method thereof

Abstract

Disclosed is an experimental device for reducing nano bubbles on coal surface and improving biological gas production. The experimental device comprises a biological gas production box, a nitrogen cylinder, a vacuum pump, a movable block assembly, a telescopic mechanical arm, a bubble monitoring system, a gas-liquid collecting and testing system and a computer; the interior of the biological gas production box is divided into an anaerobic fermentation area and a pressure regulation and control area left and right; the nitrogen cylinder and the vacuum pump both communicate with the anaerobic fermentation area; the movable block assembly is arranged in the pressure regulation and control area in a sliding mode; the bubble monitoring system is fixedly arranged on the inner top face of the anaerobic fermentation area; the gas-liquid collecting and testing system is connected with the anaerobic fermentation area; and the computer is in signal connection with an electric heating interlayer, the telescopic mechanical arm, a control switch button and the bubble monitoring system. According to the experimental device, negative pressure is generated in the coal biological fermentation process, elimination of nano bubbles on the coal surface is promoted, the nano bubble visualization process can be observed in the whole process, and meanwhile, gas and liquid generated after coal biological fermentation are detected so as to evaluate the coal biological gas production and coal degradation effects.

Description

technical field [0001] The invention relates to the technical field of coalbed methane production increasing experiments, in particular to an experimental device for reducing coal surface nano-bubbles and increasing biological gas production and a working method thereof. Background technique [0002] As a kind of unconventional natural gas, coalbed methane is a new type of clean energy, which has potential economic benefits and broad development prospects. The development of coalbed methane has the significance of disaster reduction and greenhouse effect reduction. Among many coalbed methane stimulation technologies, microbial stimulation of coalbed methane has become a current research hotspot because of its green, pollution-free, and ability to produce new coalbed methane. Microbial stimulation of coalbed methane can increase the biomethane production of coal by adding nutrients, using alkaline hydrolysis and ligninase pretreatment, chemical, biological and physical pretre...

AI Technical Summary

Problems solved by technology

However, the latest research in interface science shows that the chemical properties of the nanoscale and microscale interfaces have a significant impact on the phase interface transfer process, and there are often highly stable nanobubbles on the hydrophobic surface. This layer of bubbles is difficult to use macroscopic control methods such as temperature, pressure, and concentration. take off

The methane gas produced by methanogenic bacteria will enrich a large number of "nanobubbles" on the surface of the cell membrane, inhibiting the supply of nutrients for the cells themselves, which is not conducive to their survival, resulting in "difficult entry of substrates and difficult exit of products", resulting in low rate

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