Aerating, collecting and exhausting combining system in solid-state-composting aerobic fermentation and application thereof

Abstract

The invention discloses an aerating, collecting and exhausting combining system in solid-state-composting aerobic fermentation. The aerating, collecting and exhausting combining system comprises a fermentation trough, a medium-pressure draught fan set, a composting heap turner, main aeration ditches, fishbone-type branch aeration ditches, aeration ventilating pipes, aeration plates, a membrane sealing structure and an independent exhausting structure; the invention provides an application of the aerating, collecting and exhausting combining system. The combining system and the application thereof have the advantages that the medium-pressure draught fan set can be momentarily adjusted according to the oxygen requirement in the biological aerobic fermentation stage, the best suitable oxygen requirement is provided, the multiple kinds of air amount can be further provided without changed air pressure, broken openings and the dispersion state are reduced, the stability can be kept for a long time, and the cost, the maintenance cost and the requirement electric quantity are lower; the cost of a gas collecting system can be reduced through the membrane sealing fermentation trough, the stench concentration is further increased, the air sucking amount is decreased, and the defects that due to a single-trough or multiple-trough gas collecting cover and the gas collecting mode of a whole workshop, the air sucking amount is large, the air sucking difficulty is high, the motor power is large, and stench is spread in the whole workshop are overcome.

Description

[0001] technical field [0002] The invention relates to the technical field of fermentation process control, in particular to a combined system of aeration, collection and exhaust in aerobic fermentation of solid compost and its application. Background technique [0003] Sludge, conditioner, and back-mixed materials are mixed and stirred by the mixer and then enter the fermentation tank for fermentation. During the fermentation process, the temperature of the fermentation heap is not easy to be too high. If the temperature is too high, it will affect the death of a large number of beneficial bacteria in the material and affect the fermentation effect. , and it is necessary to provide sufficient oxygen to the microorganisms in the heap to make them fully ferment. Usually, a Roots blower is used to provide oxygen to microorganisms, and at the same time, a Roots blower or a single medium-pressure blower is used to reduce the temperature of the fermentation pile. However, the ...

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Problems solved by technology

However, the Roots blower has a high wind pressure, and it is easy to form a penetration hole when supplying oxygen to the solid-state aerobic fermentation. A large amount of water around the penetration hole will be taken away in a short time, forming a larger leakage point. Because it is a solid-state pile, it will not automatically Healing and returning to the original state will cause the wind pressure to drop rapidly, making the solid-state aerobic fermentation form an anaerobic state

To increase the wind pressure, the speed of the Roots blower must be increased, and the wind pressure will increase accordingly. The increase in the wind pressure will make the original breakthrough bigger, and the power consumption will also increase sharply, resulting in a vicious circle.

The medium-pressure fan can replace the Roots blower, but a single medium-pressure fan also has defects: although the wind pressure is not as high as the Roots blower, the air volume cannot be adjusted, which cannot meet the aerobic and dehydration needs in each process of aerobic fermentation

The overall air extraction method of the workshop is: install a centrifugal fan outside the workshop, and use the centrifugal fan to extract the odorous and harmful gases in the workshop and discharge them into the filter tank, but this method does not completely solve the air pollution problem in the workshop

On the contrary, the overall sealing cost of the workshop is too high, if there is a leakage point, it is not easy to find, and the automation requirements are also high

At the same time, not all the gases in the workshop are odorous and harmful gases. When pumping air, only the gas in the entire workshop can be replaced, resulting in a large amount of ventilation, large configuration, and high overall energy consumption.

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