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Preparation method for papermaking argillaceous activated carbon adsorption material

A technology of activated carbon adsorption and mud, which is applied in chemical instruments and methods, adsorption water/sewage treatment, sludge treatment, etc., to achieve the effects of low treatment temperature, low raw material cost and simple preparation method

Inactive Publication Date: 2015-12-09
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method of paper-making argillaceous activated carbon adsorption material, which solves the problem of paper-making sludge treatment and disposal, and the prepared activated carbon can be reused for paper-making wastewater treatment, reducing the cost of waste water and sludge treatment and disposal. Treatment of waste

Method used

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  • Preparation method for papermaking argillaceous activated carbon adsorption material

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Experimental program
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Effect test

Embodiment 1

[0027] Step 1. The biochemical sludge (primary, secondary and tertiary mixed sludge of the paper mill) is concentrated, squeezed and dried to a moisture content below 10%, ground and sieved to retain the average particle size 200 mesh sludge particles;

[0028] Step 2. Add the sludge particles obtained in Step 1 to a zinc chloride activator with a concentration of 3mol / L for activation treatment for 24 hours, with a stirring rate of 90r / min, and a weight ratio of sludge particles to zinc chloride solution of 1:3. Then dehydrated and dried;

[0029] Step 3. Put the sludge particles treated in step 2 into the pyrolysis furnace. Before carbonization, nitrogen is introduced to drive off the air in the pyrolysis furnace to prevent the sludge from being oxidized. The purge rate is 200mL / min, and then Use nitrogen as the protective gas, heat up to 500°C at a rate of 30°C / min, and hold for 30 minutes;

[0030] Step 4. The carbonized product is immersed in a hydrochloric acid solution with ...

Embodiment 2

[0033] Step 1: Concentrate, squeeze, and dry the biochemical sludge from the pulp and paper wastewater treatment plant to a moisture content of less than 10%, grind and sieving, and retain sludge particles with an average particle size of 200 mesh;

[0034] Step 2. Add the sludge particles obtained in step 1 to a zinc chloride activator with a concentration of 1mol / L for activation treatment for 48 hours, with a stirring rate of 60r / min, and a weight ratio of sludge particles to zinc chloride solution of 1:1. Then dehydrated and dried;

[0035] Step 3. Put the sludge particles treated in step 2 into the pyrolysis furnace. Before carbonization, nitrogen is introduced to drive off the air in the pyrolysis furnace to avoid oxidation of the sludge. The purge rate is 100mL / min. Use nitrogen as the protective gas, heat up to 700°C at a rate of 40°C / min and then keep it for 10 minutes;

[0036] Step 4, the carbonized product is immersed in a hydrochloric acid solution with a concentration ...

Embodiment 3

[0038] Step 1: Concentrate, squeeze, and dry the biochemical sludge from the pulp and paper wastewater treatment plant to a moisture content of less than 10%, grind and sieving, and retain sludge particles with an average particle size of 200 mesh;

[0039] Step 2. Add the sludge particles obtained in step 1 to a zinc chloride activator with a concentration of 5mol / L for activation treatment for 12 hours, with a stirring rate of 120r / min, and a weight ratio of sludge particles to zinc chloride solution of 1:4. Then dehydrated and dried;

[0040] Step 3. Put the sludge particles treated in step 2 into the pyrolysis furnace. Before carbonization, nitrogen is introduced to drive off the air in the pyrolysis furnace to avoid oxidation of the sludge. The purge rate is 150mL / min. Use nitrogen as the protective gas, heat up to 400°C at a rate of 10°C / min and keep it for 90 minutes;

[0041] Step 4: The carbonized product is immersed in a hydrochloric acid solution with a concentration of 2...

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Abstract

The invention discloses a preparation method for a papermaking argillaceous activated carbon adsorption material. The preparation method comprises the following steps of concentrating, squeezing and drying biochemical sludge from a pulping and papermaking wastewater treatment plant until the water content is below 10 percent, and grinding, sieving and retaining sludge particles with the average grain diameter of 200 meshes; adding the sludge particles into an activating agent for activating treatment, and then performing dewatering and drying; placing the dried sludge particles into a pyrolyzing furnace; by taking nitrogen gas as protective gas, performing carbonizing treatment on the nitrogen gas under an anaerobic condition; washing a product subjected to the carbonizing treatment with a hydrochloric acid solution and then washing the product with distilled water to be neutral, and drying, grinding and sieving to prepare the papermaking argillaceous activated carbon adsorption material. The preparation method disclosed by the invention is simple, and breaks through a traditional technique of preparing activated carbon from coal and wood; the cost of raw materials is low, so that the contradiction that wood and energy in China are in shortage is alleviated; besides, the preparation method also opens up a new path for treating solid papermaking wastes.

Description

Technical field [0001] The invention belongs to the technical field of preparation of activated carbon adsorption materials, and specifically relates to a preparation method of a papermaking muddy activated carbon adsorption material. Background technique [0002] Papermaking sludge from the off-site wastewater treatment plant of a papermaking enterprise usually includes primary sedimentation sludge, secondary biochemical treatment sludge, and some treatment plants adopt tertiary treatment, so it also includes tertiary flocculation sedimentation sludge. Due to the different water quality of wastewater treatment facilities at different levels, the sludge composition is also different. The primary sludge is mainly suspended solids in the wastewater, which contains a small amount of fiber, a large number of parenchyma cells and other cells, and the ash content is about 25%. %-30%, fine sediment particles, strong water holding capacity. The main component of the secondary sludge is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F11/00C02F11/10C02F1/28C01B31/12C02F103/28
CPCY02P20/10Y02W10/40
Inventor 张安龙刘琳罗清董婷婷景立明
Owner SHAANXI UNIV OF SCI & TECH
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