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AssigneesBelcho Alexandrov Belchev, Patrick George Smithuis
InventorBelcho Alexandrov Belchev
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The invention discloses an improved apparatus for continuous purification of liquids, dewatering and drying of the separated non-filtering solids. The apparatus is intended to be applied for the purification of industrial or household waste liquids, as well water form natural sources, by separating and drying of non-filtering solids. The apparatus can be applied successfully for dewatering and drying of various slurries without the emitting of vapours, dust and other detrimental substances in the atmosphere. The apparatus includes a belt filter (1) with an incorporated filter sector and an elastic thermos-filter press (35). The belt filter ensures a continuous purification of water from different sources by separating the non-filtering solids and detrimental ion components comprised in the water, and ensures their bacterial sterility. The separated non-filtering solids are permanently accumulated in the belt filter, and are mixed with the water fed to be purified forming together a slurry. The thickness of the slurry is permanently increasing. After reaching a definite value of thickness, the slurry is pumped by a thickening cone mounted under the filter sector, and is compressed to be dewatered and dried in the elastic thermo-filter press. The cake compressed in the chambers of the elastic thermo-filter press is dewatered and dried in two stages: The first stage is effected by the pressure of a combined vacuum pressure pump, and the vacuum generated by it second vacuum pressure pump. The second stage is realized simultaneously by the longitudinal shrinkage of the elastic thermo-filter press which squeezes the cake, by extraction of the residual capillary moisture under the action of a “steam jacket” generated by the partially evaporated residual liquid phase, and by the vacuum created by the second vacuum pressure pump. The apparatus can be used Successfully for dewatering and drying different types of slurries, and the power consumption is substantially reduced.
Apparatus for continuous purification of liquids, dewatering and drying of the separated solids, comprising a belt filter and an elastic thermo-filter press, said belt filter including a feed for liquids to be purified and a filter sector comprising a continuous filter belt and which at its bottom is connected to a thickening cone for thickening the solids separated by the continuous filter belt, said filter sector being connected to a pipe including a pump for discharge of purified liquid, said thickening cone being connected through a feed pipe including a combined vacuum pressure pump to said elastic thermo-filter press for delivering thickened mixture from the thickening cone to the elastic thermo-filter press, wherein the elastic thermo-filter press is connected through a return line for delivering filtrate resulting from the operation of the thermo-filter press to the belt filter.
Thermo-filter press for a thickened mixture or slurry comprising a plurality of filter plate assemblies arranged parallel to each other in series and a plurality of heating plates being arranged in between the filter plates and having heating membranes mounted thereon and extending into the space formed between consecutive filter plate assemblies, said filter plate assemblies defining filter chambers being in fluid communication with an outlet for the filtrate, said filter plate assemblies being provided with flexible hollow conduits at their circumferential edges, said heating plates and said filter plate assemblies with their flexible hollow conduits forming chambers with variable volume for the mixture or slurry.
Belt filter including a feed container for liquids to be purified and a filter sector underneath said filter container comprising a continuous filter belt and which at its bottom is connected to a thickening cone for thickening solids separated by the continuous filter belt, said filter sector being connected to a pipe including a pump for discharge of purified liquid, said thickening cone having an outlet, wherein said continuous filter belt is arranged in a first frame for being immersed in the liquid to be purified.
Method for continuous purification of a liquid and, dewatering and drying separated solids, wherein the liquid to be purified is fed into a filter sector in which a continuous filter belt is placed, filtered by said filter belt and passed through a drain belt and a perforated absorption chamber into an absorbing substance and from there through a porous partition into a vacuum chamber from which it is discharged as purified liquid, wherein the non-filtered solids of the liquid to be purified that are collected upon the filter belt are mixed with the liquid to be purified to thicken said liquid, said thickened liquid being collected in a thickening cone and being pumped out at a definite value of thickness to an elastic thermo-filter press where it is additionally filtered under the influence of vacuum, the resulting filtrate being fed back to the filter sector.
Method for the purification of a thickened slurry mixture, wherein the mixture is fed into press chambers defined by filter plate assemblies comprising, porous partitions and elastic hollow conduits and by heating plates positioned in between the filter assemblies, the porous partitions having a filter side and an opposite side, wherein the hollow conduits are expanded to ensure a tight and reliable contact between the filter plate assemblies and the heating plates and to expand the press chambers, wherein in a first filtering phase due to pressure difference the mixture is filtered at the filter side of the porous partitions and the filtrate is discharged at the opposite side of the porous partitions.
Dependencies are inferred from the claim text.