Bottom filtration structure of dual-layer filter

Abstract

The invention discloses a bottom filtration structure of a dual-layer filter. The bottom filtration structure comprises filtering pipes, mounting clapboards, a first group of vertical liquid collecting cavities, a second group of vertical liquid collecting cavities, a first arc liquid collecting groove and a second arc liquid collecting groove, wherein the filtering pipes are of a multi-layer structure which is arranged horizontally; the first group of vertical liquid collecting cavities and the second group of vertical liquid collecting cavities are respectively connected to the filtering pipes on different layers; a first group of drainage holes and a second group of drainage holes are formed in the mounting clapboards; the first group of vertical liquid collecting cavities and the second group of vertical liquid collecting cavities are respectively formed above the mounting clapboards through mounting bolts and in a way of sealing through sealing pads and corresponding to the first group of drainage holes and the second group of drainage holes; the first arc liquid collecting groove and the second arc liquid collecting groove are respectively formed below the mounting clapboards in a way of corresponding to the first group of vertical liquid collecting cavities and the second group of vertical liquid collecting cavities; and the first arc liquid collecting groove and the second arc liquid collecting groove are also respectively connected with a first liquid outlet connecting pipe and a second liquid outlet connecting pipe. Due to a bottom filtering structure of the dual-layer filter, filter cakes can be convenient to detach, and the aim that no liquid is left after filtration is fulfilled to the great extent.

Description

technical field [0001] The invention relates to a filtering device, in particular to a bottom filtering structure of a double-layer filter. Background technique [0002] The State Intellectual Property Office announced on January 19, 2005, the patent number ZL200420004020.8 is a utility model patent named "bottom filter mechanism of vertical filter", which discloses a filter structure at the bottom of a vertical filter , it changes the traditional mechanism from the original filter tube perpendicular to the filter structure at the bottom of the horizontal mounting plate to the horizontal setting, according to its embodiment, it can solve the function of facilitating slag unloading or realizing no residual liquid to a certain extent. [0003] However, although its embodiment 1 and 2 can realize slag unloading convenience, for the solid capacity lower than the uppermost filter tube plane, gas short circuit phenomenon will occur during gas pressure filtration, and there will st...

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Problems solved by technology

[0003] However, although its embodiment 1 and 2 can realize the convenience of unloading slag, but for the solid capacity lower than the uppermost filter tube plane, gas short circuit phenomenon will occur during gas pressure filtration, and there will still be residual liquid

If reduce its filtration installation layer number, although can reduce remaining liquid, must lose filtration area, increase filtration process time exponentially; Its embodiment 3 realizes layering by arc-shaped filtrate collection branch pipe, although can realize that there is no remaining liquid after filtering or The remaining liquid is minimized, but because the arc-shaped filtrate collection branch pipe used to collect the filtrate is set above the installation partition, the filter cake is instead combined in the frame formed by the arc-shaped filtrate collection branch pipe and the filter tube after the bottom cover is opened, making Unloading and cleaning is quite troublesome, and there are dead corners that are difficult to clean and unload the filter cake

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