Prepn of wet sludge carbonizing adsorbent

A wet sludge and adsorbent technology, applied in the field of environmental engineering, can solve the problems of high cost of sludge drying treatment, difficult to popularize and apply, achieve significant environmental and social benefits, avoid secondary pollution, and reduce emissions. Effect

Inactive Publication Date: 2007-06-06
上海银龙水务设备公司
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

The research on the preparation of carbonized materials from sludge currently adopts the method of first drying the sludge, and then using the dried sludge as raw material for activation a

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0015] Example 1

[0016] Take the remaining sludge from a sewage plant in Shanghai and dehydrate it to make it have a solid content of 10% (water content of 90%), and add a 40% zinc chloride solution in a volume ratio of 1:0.5 to activate 4 After hours, the mixture is dried at 105°C to a moisture content of 10%. Accurately weigh a certain amount of sample, put it into a high-temperature carbonization furnace, under the condition of steam as protective gas, pyrolyze and carbonize at 700°C for 30 minutes at a heating rate of 40°C per minute, and cool to room temperature to obtain the crude The product is washed repeatedly with 3% hydrochloric acid solution to remove zinc chloride and other inorganic substances, and adjusted to neutral with distilled water, and then dried at 105°C to constant weight for later use. The iodine value of the prepared carbonized material is 650mg·g -1 ; The specific surface area is 547.7m 2 ·G -1 ; The pore volume is 0.22cm 3 ·G -1 . All other indexes ca...

Example Embodiment

[0017] Example 2

[0018] Take the remaining sludge (solid content of about 20%) from a sewage plant in Shanghai, add a 55% zinc chloride solution in a volume ratio of 1:3, stir thoroughly on a magnetic stirrer, and activate for 24 hours. The mixture was baked at 105°C to a moisture content of 15%. Accurately weigh 20g into the high-temperature carbonization furnace, pass in water vapor as a protective gas, and perform pyrolysis and carbonization at 600°C for 30 minutes at a heating rate of 10°C per minute, and then cool to room temperature. The obtained crude product uses 3% hydrochloric acid. The solution is rinsed to remove zinc chloride and other inorganic substances, then washed with distilled water until it is neutral, and then dried at 105°C to constant weight for later use. According to GB7702.7-1997, the prepared activated carbon carbonized material has an iodine value of 720mg·g -1 ; The specific surface area is 487.7m 2 ·G -1 , The pore volume is 0.18cm 3 ·G -1 . All ot...

Example Embodiment

[0019] Example 3

[0020] Take the remaining sludge from a sewage plant in Shanghai and dehydrate it to make it have a solid content of 16%. Add a 50% zinc chloride solution in a volume ratio of 1:2, activate it for 4 hours, and then put the mixture in Dry to 15% moisture content at 105°C. Accurately weigh a certain amount of sample, put it into a high-temperature carbonization furnace, under the condition of water vapor as protective gas, perform pyrolysis and carbonization at 450°C for 60 minutes at a heating rate of 20°C per minute, and then cool to room temperature The crude product is washed repeatedly with 3% hydrochloric acid solution to remove zinc chloride and other inorganic substances, and adjusted to neutral with distilled water, and then dried at 105°C to constant weight for later use. The prepared carbonized material has an iodine value of 580mg·g -1 ; The specific surface area is 426.1m 2 ·G -1 ; The pore volume is 0.11cm 3 ·G -1 ; The yield of carbonized materials ...

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Abstract

The present invention relates to the preparation process of wet sludge carbonizing adsorbent. The wet sludge carbonizing adsorbent is prepared with sludge from city sewage treating yard as main material, and through adding activator, such as zinc chloride solution, etc. commonly used in preparing active carbon to activate sludge, drying the activated sludge, pyrolytically carbonizing in a high temperature carbonizing furnace with water steam as protecting gas, cooling, washing, and stoving. Preparing adsorbent with sludge can reduce secondary pollution, lower adsorbent preparing cost and result in obvious environment benefit and economic benefit.

Description

technical field [0001] The invention relates to a method for preparing a wet sludge carbonization adsorbent, which is a method for preparing a carbonization adsorbent by utilizing urban surplus sludge, and further realizing resource utilization of the sludge. It belongs to the field of environmental engineering technology. Background technique [0002] The treatment and disposal of sludge in urban sewage treatment plants is a hot topic in the field of environmental engineering. The preparation of carbonized materials using sludge as raw material is a method of sludge resource utilization. The research on the preparation of carbonized materials from sludge currently adopts the method of first drying the sludge, and then using the dried sludge as raw material for activation and carbonization. The disadvantage of this method is that the sludge drying treatment The high cost makes it difficult to popularize and apply this technology in actual production. (Fu-Shen Zhang, Jerom...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30
Inventor 朱南文尹炳奎寿宗奇员帅波
Owner 上海银龙水务设备公司
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