The invention discloses a construction method for a novel round-pot-shaped high-efficiency combined
methane tank, which relates to a construction method for a
methane tank. The
methane tank comprises an inlet
pipe, a fermenting tank and a hydraulic discharging chamber, wherein the fermenting tank is arranged below the ground, the bottom of the fermenting tank is an inclined tile bottom, the hydraulic discharging chamber is arranged at the side surface of the lower bottom of the fermenting tank, the inlet
pipe is obliquely arranged at one side of the higher bottom of the fermenting tank, the lower end of the inlet
pipe is communicated with the lower part of the sidewall of the fermenting tank, the top of the fermenting tank is provided with a
cut spherical shell-like tank arch which has an upward spherical surface, recessed parts at the periphery of the top of the
cut spherical shell-like tank arch are provided with
rammed earth, the central position of the
cut spherical shell-like tank arch is equipped with a movable cover, a
water storage loop is mounted on the movable cover, the center of the movable cover is provided with a gas conveying pipe communicated with the interior of the fermenting tank and the outside, a methane
safety valve is mounted on the upper end of the gas conveying pipe, the top of the sidewall of the hydraulic discharging chamber is provided with an overflow port, and a hydraulic chamber cover plate is arranged on the top of the hydraulic discharging chamber. The construction method provided by the invention overcomes the problems of
water leakage, gas leakage, insufficient gas storage space, a short service life, great potential safety hazards and a great occupied
land area of conventional methane tanks.