Filter cartridge with calcined oyster shell powder

Abstract

A filter cartridge containing calcined oyster shell powder includes a central tube, a filter media, and a filter layer. The filter media is connected to the central tube. The filter layer is uniformly coated on the filter media and comprises calcined oyster shell powder. The calcined oyster shell powder is made by calcining several natural oyster shells. Because the calcined oyster shell powder is made by calcining several natural oyster shells, the calcined natural oyster shells have a porous structure, thereby improving the adsorption effect of the filter media.

Claims

1. A filter element containing calcined oyster shell powder, comprising: a central tube; a filter material connected to the central tube; and a filter layer uniformly coated on the filter material and comprising calcined oyster shell powder, the calcined oyster shell powder being made by calcining several natural oyster shells.

2. The filter element containing calcined oyster shell powder as described in claim 1, wherein, The filter media is configured as a non-woven fabric.

3. The filter element containing calcined oyster shell powder as described in claim 1, wherein, The filter media is wound around the outer circumference of the central tube.

4. The filter element containing calcined oyster shell powder as described in claim 1, wherein, The calcined oyster shell powder is made by crushing natural oyster shells.

5. The filter element containing calcined oyster shell powder as described in claim 4, wherein, Each of these natural oyster shells has an outer shell layer, a prismatic layer, and a pearl layer from the outside to the inside. The calcined oyster shell powder is made by pulverizing these natural oyster shells after removing the outer shell layer and the pearl layer.

6. The filter element containing calcined oyster shell powder as described in claim 1, wherein, The calcined oyster shell powder was sieved through a 150-mesh screen.

7. The filter element containing calcined oyster shell powder as claimed in claim 1, wherein, The calcination temperature of the calcined oyster shell powder is between 800℃ and 1200℃.

8. The filter element containing calcined oyster shell powder as claimed in claim 1, wherein, The calcination time for the calcined oyster shell powder is between 30 and 60 minutes.

9. The filter element containing calcined oyster shell powder as claimed in claim 1, wherein, The filter layer consists of calcined oyster shell powder and water. Based on the total weight of the filter layer being 100 wt%, the weight ratio of the calcined oyster shell powder to water is between 4:1 and 2:1.

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