Warming and warm-keeping system of overground marsh gas tank

Abstract

The invention relates to a warming and warm-keeping system of an overground marsh gas tank, belonging to the field of renewable energy source development. A warming system is a capillary network (7) uniformly arranged at the outer side of the side wall of a marsh gas tank (14); a warm-keeping system is composed of a bottom warm-keeping layer (11), side wall warm-keeping layers (8) and a top warm-keeping layer (5); the bottom warm-keeping layer (11) is arranged at the bottom of the marsh gas tank (14); the side wall warm-keeping layers (8) are arranged on the side wall of the capillary network (7) of the marsh gas tank (14) and the outer side of the capillary network (7); the top warm-keeping layer (5) is arranged at the outer side of the top of the marsh gas tank (14); and the outer sides of the top warm-keeping layer (5) and the side wall warm-keeping layers (8) are provided with protective layers (15). According to the invention, the defect of high maintenance and management cost in the prior art is overcome; and the warming and warm-keeping system of an overground marsh gas tank can ensure the fermentation temperature stability of the marsh gas tank, reduces the investment and maintenance cost of equipment, and is simple to operate and maintain, high in reliability and high in energy consumption input-output ratio.

Description

technical field [0001] The invention belongs to the field of renewable energy development, and in particular relates to a temperature-increasing and heat-insulating system for an above-ground biogas pit. Background technique [0002] Small and medium-sized biogas projects have been improved and optimized for many years. Because of the convenience of management and maintenance of biogas digesters and the need for safety requirements, most of them adopt above-ground structures. As an outdoor structure, the above-ground biogas digester generally needs to take measures to increase the temperature and heat preservation of the biogas digester to maintain the optimal fermentation temperature of the biogas slurry. At present, most of the small and medium-sized above-ground biogas digesters use an artificial insulation layer directly in the biogas digester to reduce heat loss, and only a small number of biogas digesters add heat coils inside to artificially increase the temperature. ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects in the prior art that the reliability of the heating and heat preservation system is not high, the temperature gradient of the fermentation liquid is large, the heat exchange efficiency of the heat exchanger decreases with the increase of the use time, and the maintenance and management cost is high. Provide a biogas digester that can effectively maintain the stability of the fermentation temperature of the biogas digester, reduce the investment and maintenance costs of temperature increasing and heat preservation control equipment, have high reliability, high energy consumption input-output ratio, and ensure the long-term stable operation of the biogas digester. Thermal insulation system

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