Processing technology of walnut shell filtering material

A processing technology, walnut shell technology, applied in the direction of liquid separation, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of inability to absorb waste water, easy agglomeration of harmful substances, etc., achieve remarkable filtering effect and improve the quality of purified water , the effect of high hardness

Inactive Publication Date: 2015-12-09
SHANXI CHANGYUAN AGRI & SIDELINE NATIVEPROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a processing technology for walnut shell filter material in order to solve the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0014] Embodiment 1: A processing technology of walnut shell filter material, including the following steps:

[0015] (1) Impurity removal: the raw material walnut shells are air-selected by a winnowing machine to filter out the green peel and firewood impurities;

[0016] (2) Disinfection and cleaning: the walnut shells after winnowing are soaked in a sodium hypochlorite disinfectant with a concentration of 5 ppm for 5 minutes, and then washed with distilled water;

[0017] (3) Drying and crushing: drying at 65°C for 14 hours with a dryer to make the water content less than 10%; crusher for crushing;

[0018] (4) Polishing, steaming and degreasing: Polishing with a barrel polishing machine to remove the surface bumps to make the surface roughness reach Ra0.8; steaming in a steaming machine for 1 hour; then degreasing in a dryer at 85°C for 20 hours, including Water content is less than 8%; use 185nm wavelength ultraviolet radiation for 20 hours to sterilize; screening and grading, th...

Example Embodiment

[0022] Example 2: A processing technology of walnut shell filter material. The walnut shells after winnowing were soaked in a sodium hypochlorite disinfectant with a concentration of 5ppm for 7 minutes, and then disinfected with distilled water; the dryer was dried at 68°C for 16 hours, and the washing machine Steam and wash for 2 hours; then defatted in a dryer at 88°C for 20 hours. The prepared walnut shell filter material has a particle size of 2.1 mm. The remaining steps are the same as those described in Example 1. After testing, the walnut shell filter material prepared by the method of the present invention is used to treat wastewater. The suspended solids removal rate reaches 97%, the oil removal rate reaches 93%, the turbidity of the filtered water is reduced from above 5NTU to below 1NTU, and the filtration effect is significant.

Example Embodiment

[0023] Example 3: A processing technology of walnut shell filter material. The walnut shells after winnowing are soaked in a sodium hypochlorite disinfectant with a concentration of 5ppm for 10 minutes and then disinfected with distilled water; the dryer is dried at 70°C for 18 hours, and the steaming machine Steaming and washing for 3 hours; then degreasing in a dryer at 90°C for 20 hours. The prepared walnut shell filter material has a particle size of 2.5 mm. The remaining steps are the same as those described in Example 1. After testing, the walnut shell filter material prepared by the method of the present invention is used to treat wastewater. The suspended solids removal rate reaches 96%, the oil removal rate reaches 94%, the turbidity of the filtered water is reduced from above 5NTU to below 1NTU, and the filtration effect is significant.

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Abstract

The invention belongs to the technical field of adsorption material preparation, aims to solve the problems that conventional filtering materials cannot absorb harmful substances in wastewater and get agglomerated easily, and provides a processing technology of a walnut shell filtering material. The processing technology comprises the following steps: removing the impurities, disinfecting the walnut shells, washing, drying, grinding, polishing, steaming and washing to remove the grease, polishing the walnut shells in a cylinder polishing machine to remove the projected parts on the surface and reach a surface roughness of Ra0.8; steaming and washing the walnut shells in a steaming and washing machine for 1 to 3 hours; degreasing the walnut shells in a baking oven with a temperature of 85 to 90 DEG C for 20 hours until the water content is less than 8%; irradiating the walnut shells by UV rays with a wavelength of 185 nm for 20 hours to kill the bacteria; and finally screening and grading so as to obtain the walnut shell filtering material. The prepared walnut shell filtering material can absorb suspensions and harmful substances in wastewater. During the application process, the hardness of the provided filtering material is high, the filtering material will not get rotten or agglomerated, the toughness of the filtering material is high, moreover, the filtering material can be easily regenerated, thus the replacement frequency is reduced, the labor and time are saved, and the cost is low. The processing technology is simple, the water quality can be improved effectively, the raw material sources are wide, and the using effect is prominent. The provided novel filtering material can greatly reduce the water treatment cost.

Description

technical field [0001] The invention belongs to the technical field of adsorption material preparation, and in particular relates to a processing technology of walnut shell filter material. Background technique [0002] At present, most of the filter materials for wastewater treatment widely used in China are made of quartz sand, anthracite and other materials. During wastewater treatment, most of these materials are layered into filter tanks, and the wastewater can be filtered through the filter tanks. Purpose. The above-mentioned materials have the following disadvantages as filter materials for wastewater treatment: one is that they have no adsorption capacity, and can only play the role of filtering suspended solids in wastewater, and cannot absorb harmful substances. The second is that it is easy to agglomerate and needs to be replaced frequently, which is time-consuming and labor-intensive, and the cost is high. [0003] The invention patent "Walnut shell adsorption ...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/40
Inventor 李保卫冯蕊蕊冯光旭冯昱张秀婷
Owner SHANXI CHANGYUAN AGRI & SIDELINE NATIVEPROD
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