Large and medium-sized layered heating experiment device for anaerobic fermentation of coal and experiment method of layered heating experiment device

Abstract

The invention provides a large and medium-sized layered heating experiment device for anaerobic fermentation of coal. The device comprises the tank body, a feed cylinder is arranged on the top of thetank body, the top of the feed cylinder is provided with a tank cover, a horizontal push-pull type material retention mechanism is arranged on the lower portion of the feed cylinder, and an enrichmentculture area is arranged in the feed cylinder. A plurality of gas holes are formed in the top of the tank body, a circulating flow guide cylinder coaxial with the tank body is arranged in the tank body, a mixing gas production area is arranged in the tank body, and a first gas suction opening and a second gas suction opening are formed in the edge of the top of the tank body and the upper portionof the feed cylinder respectively. The invention further discloses an experiment method of the large and medium-sized layered heating experiment device for anaerobic fermentation of the coal. The principle is scientific, the design is reasonable, and uniform heating is kept in the whole fermentation process; the mixing gas production area and the enrichment culture area are integrated into one, so that the interference of outside air is avoided to the greatest extent; by using a gas-pressurization circulating type stirring device, a secondary guarantee is provided for the uniform heating of the fermentation process.

Description

technical field [0001] The invention belongs to the technical field of coal seam bio-energy development, and in particular relates to a large and medium-sized coal anaerobic fermentation stratified heating experimental device and an experimental method. Background technique [0002] The development of coal seam bioenergy is of great significance to the clean utilization of coal resources, the effective improvement of coal rock reservoirs, and the supplement of coal seam gas content, and is an important research field of coal engineering. At present, small sample static simulation gas production experiments under laboratory conditions have been generally involved, but there are still few studies on medium-scale or even large-scale fermentation simulation experiments. The medium-scale dynamic fermentation simulation experiment is an intermediate step and the only way to realize the large-scale commercial development of coal seam bioenergy, but the expansion of equipment will l...

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Problems solved by technology

The medium-scale dynamic fermentation simulation experiment is an intermediate step and the only way to realize the large-scale commercial development of coal seam bioenergy, but the expansion of equipment will lead to an increase in research and development costs and technical difficulties, and at the same time put forward new requirements for the reactor , including temperature, experimental materials, etc.

Due to the small amount of fermentation samples and shallow compaction of coal samples in conventional static simulators, the entire reaction device and reaction mixed samples can be heated evenly in the constant temperature culture tank, but it is difficult to have large-capacity samples in medium-sized or even large-scale fermentation devices. Uniform heating leads to inconsistent fermentation temperatures in the upper, middle and lower areas of the mixed sample, making it difficult for the experiment to run effectively and stably

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