초록 ▼

A sewage digester cap for use with a generally cylindrical tank, the cap held in place by a series of concrete anchors to ballast the cap on the digester. The anchors are suspended from the cap by a series of steel cables. The cap includes a liquid sealing skirt of a length to maintain the liquid se

A sewage digester cap for use with a generally cylindrical tank, the cap held in place by a series of concrete anchors to ballast the cap on the digester. The anchors are suspended from the cap by a series of steel cables. The cap includes a liquid sealing skirt of a length to maintain the liquid seal in the presence of a high liquid level within the tank. The cap has removable anchors allowing the digester to be adjusted to accommodate different gas pressures inside the tank by using different ballast weights. The anchors remain submerged even when the maximum liquid level is reached allowing for increased gas storage with minimal pressure change. Additionally, the anchors provide a lower center of gravity for the cap which also reduces the tendency of the cap to tip in the wind or other atmospheric conditions. The cap is removable to allow for cleaning, maintenance and disassembly for relocation of the cap.

대표청구항 ▼

[ What is claimed is:] [1.]1. A cap assembly for covering a collecting and treating tank for holding liquids and gas having a vertically cylindrical tank with a bottom fixed to a bottom edge of a circular side wall, said cap assembly comprising:a vertically movable circular cap for receipt by the to

[ What is claimed is:] [1.]1. A cap assembly for covering a collecting and treating tank for holding liquids and gas having a vertically cylindrical tank with a bottom fixed to a bottom edge of a circular side wall, said cap assembly comprising:a vertically movable circular cap for receipt by the top edge of the cylindrical tank;a series of removable anchors, connected to said cap by cables, for permitting said cap to be adjusted for different pressures by using different anchor weights, to accommodate a change in pressure within the tank; andmeans for restricting horizontal movement of said cap to prevent tipping of said cap in the wind.