Carbide slag slurry filtering process and self-cleaning filter

Abstract

The invention relates to carbide slag slurry filtering process and a self-cleaning filter. The filter consists of a plurality of filter units which are connected in parallel and have same structures, all the units share one inlet header pipe (2) and one outlet header pipe (1), differential pressure gauge interfaces (4-1) and (4-2) are arranged between the inlet header pipe (2) and the outlet header pipe (1), a filter cylinder (5) is taken as a main body of each filter unit, a filter element component (6) is arranged in the filter cylinder, an outlet pipe (1-1) is arranged at the upper part ofthe filter cylinder, the lower part of the filter cylinder is connected with an inlet pipe (2-2) and a drain pipe (3) by a tee joint (2-3) respectively, and valves (2-1) and (3-1) are respectively installed on the inlet pipe and the drain pipe. The self-cleaning filter is characterized in that the upper part of the filter element component (6) is connected with a tube plate (6-3) by an auxiliary pipe (6-1); and the auxiliary pipe is downwardly connected with a filter element (6-2), and the pore interval of a filter screen of the filter element is 100mum-800mum. In the invention, the filter screen (100mum-800mum) with macropores is adopted, and the design of filtering and running pressure difference regulation (5KPa-300KPa) is combined, so that the content of small particles (60mum) in thecarbide slag slurry is controlled, and the double index requirements on carbide slag granularity and solid content can be controlled accurately.

Description

technical field [0001] The invention relates to a treatment technology for waste residue in acetylene produced by calcium carbide method, in particular to a calcium carbide slag slurry filtration process and a self-cleaning filter. Background technique [0002] The production of acetylene by the domestic calcium carbide method will inevitably produce auxiliary industrial waste carbide slag slurry. At present, there are two main digestion methods for calcium carbide slag slurry: one is to dehydrate the calcium carbide slurry to form dry slag as raw materials for the production of cement and other building materials; the other is to use calcium carbide slurry After filtration and purification, replace calcium carbonate and use it as a desulfurizer in the desulfurization system of the power plant. The composition of solid particles in calcium carbide slag slurry is very complex. In addition to calcium hydroxide and calcium oxide, it also contains various solid particles such as...

AI Technical Summary

Problems solved by technology

However, the effect of the cyclone separator for the separation of large particles in the calcium carbide slurry is very bad, specifically shown in: 1. The work efficiency is low. Although the particle size of calcium hydroxide and calcium oxide particles in the calcium carbide slurry is very small, the plasticity and The agglomeration is very strong, and the adhesion of small particles to heavy and large particles requires a large amount of carbide slurry to be carried smoothly from the cyclone sewage outlet, and its working efficiency can reach 60-70% at most

2. The separation effect of large particles is not ideal. The calcium carbide slurry contains a large amount of carbonaceous particles. The specific gravity of these particles is very close to that of calcium hydroxide and calcium oxide particles. The cyclone separator cannot effectively separate them from the calcium carbide slurry. out, and because the calcium carbide slurry is in the form of a thick slurry, metal particles with a particle size of 100-800 microns cannot be effectively separated. The solid particle size index of the calcium carbide slurry treated by the cyclone separator: 240 mesh screen Sieving rate <70%, which is several times different from the required sieving rate index

In the end, the filter press can only become the dehydration equipment for calcium carbide slurry

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