Resourceful treatment method for chemical sludge

A treatment method and technology for chemical sludge, applied in the field of chemical sludge recycling, can solve the problems of high operation cost, long investment recovery period, lack of land resources, etc., to save treatment cost, low operation cost and process investment. less effect

Active Publication Date: 2016-06-15
NANJING SHENKELONG ENVIRONMENTAL PROTECTION
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Landfill is currently a widely used treatment method, but because of the risk of polluting the groundwater near the landfill, the high cost of sludge transportation and landfill site construction, the limited capacity of the landfill, and the increasing scarcity of land resources, the its gradually being phased out
Sludge incineration technology is to send dewatered sludge directly into the incinerator for incineration. It is the "most thorough" sludge treatment method. It can carbonize all organic matter, effectively kill pathogens, and minimize sludge volume. However, sludge Incineration has large investment and high operating costs, low absolute economic benefits, and long investment recovery period

Method used

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  • Resourceful treatment method for chemical sludge

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Step 1) Divide the sludge obtained after the paper mill sewage treatment into two parts, when the mass ratio between the two parts is 1:1.2.

[0014] Step 2) A part of the sludge is dried to constant weight, pulverized after cooling, sieved with 12 meshes, and then ZnCl with a concentration of 1 mol / L is added 2 Solution, Sludge and ZnCl 2 The mass ratio of the solution is 1:1. After immersion at 60°C for 4 hours, separation, and drying of the solid, the temperature was raised to 400°C at a rate of 45°C / min in a muffle furnace, maintained for 60 minutes, and a porous solid was obtained after cooling.

[0015] Step 3) Add sulfuric acid with a concentration of 96% to another part of the sludge, stir continuously until the pH value is 1, add hydrogen peroxide with a concentration of 30%, and at the same time pass air, and the air flow is 7m 3 / h, after 2 hours, filter and take the filtrate.

[0016] Step 4) The porous solid obtained in step 2) is placed in the filtrate ...

Embodiment 2

[0018] Step 1) Divide the sludge obtained after the paper mill sewage treatment into two parts, when the mass ratio between the two parts is 1:1.5.

[0019] Step 2) A part of the sludge is dried to constant weight, pulverized after cooling, sieved with 12 meshes, and then added with ZnCl with a concentration of 1.5 mol / L 2 Solution, Sludge and ZnCl 2 The mass ratio of the solution is 1:1.5. After immersion at 70°C for 8h, separation, and drying of the solid, the temperature was raised to 400°C at a rate of 50°C / min in a muffle furnace, maintained for 70min, and a porous solid was obtained after cooling.

[0020] Step 3) Add sulfuric acid with a concentration of 98% to another part of the sludge, stir continuously until the pH value is 2, add hydrogen peroxide with a concentration of 40%, and at the same time pass air, and the air flow is 10m 3 / h, after 5 hours, filter and take the filtrate.

[0021] Step 4) The porous solid obtained in step 2) is placed in the filtrate obt...

Embodiment 3

[0023] Step 1) Divide the sludge obtained after the paper mill sewage treatment into two parts, when the mass ratio between the two parts is 1:1.2.

[0024] Step 2) A part of the sludge is dried to constant weight, pulverized after cooling, sieved with 12 meshes, and then added with ZnCl with a concentration of 1.5 mol / L 2 Solution, Sludge and ZnCl 2 The mass ratio of the solution is 1:1.5. After immersion at 70°C for 8h, separation, and drying of the solid, the temperature was raised to 400°C at a rate of 50°C / min in a muffle furnace, maintained for 70min, and a porous solid was obtained after cooling.

[0025] Step 3) Add sulfuric acid with a concentration of 96% to another part of the sludge, stir continuously until the pH value is 1, add hydrogen peroxide with a concentration of 30%, and at the same time pass air, and the air flow is 7m 3 / h, after 2 hours, filter and take the filtrate.

[0026] Step 4) The porous solid obtained in step 2) is placed in the filtrate obta...

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Abstract

The invention discloses a resourceful treatment method for chemical sludge. The resourceful treatment method comprises steps as follows: sludge obtained after sewage treatment of a paper mill is divided into two parts, one part is subjected to drying, smashing, screening and carbonization, and a porous solid is obtained; the other part is subjected to acid-adding dissolving, oxidization and filtering, and a filtrate is obtained; the porous solid is put in the filtrate and soaked for 2-4 h, evaporation is performed, all moisture is removed, and particles are obtained after breaking; the particles can be used for removing phenol. The more appropriate mass ratio of the two parts is 1:(1.2-1.5), when the mass ratio is 1:1.3, that is, when the mass ratio of the part for acquisition of the porous solid to the part for acquisition of the filtrate is 1:1.3, the resource utilization rate is the highest.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for treating chemical sludge as a resource. Background technique [0002] In recent years, water pollution control in the paper industry has become a focus of attention of the whole society. During the paper production process, a large amount of sewage containing high concentrations of suspended solids and organic substances will be generated. If it is discharged into rivers and lakes without treatment, it will cause serious environmental pollution. Due to the strictness of environmental pollution, the state has put forward higher requirements for pollution control, formulated and issued mutual environmental protection management measures, and paper mills are faced with the work of treating discharged sewage. [0003] Homogeneous Fenton technology is commonly used today to treat sewage. The Fenton process is a catalytic oxidation technology t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F11/00C02F1/28C02F101/34C02F103/28
CPCB01J20/20B01J20/28064C02F1/283C02F11/00C02F2101/345C02F2103/28
Inventor 田宝凤
Owner NANJING SHENKELONG ENVIRONMENTAL PROTECTION
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