Preparation method of activated coke for water treatment
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A technology for activated coke and water treatment, applied in the direction of adsorption water/sewage treatment, chemical instruments and methods, inorganic chemistry, etc. Carbonization efficiency, high moisture content, and high volatile content
Inactive Publication Date: 2011-04-06
北京国能普华环保工程技术有限公司 +1
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Problems solved by technology
[0004] For this reason, the technical problem to be solved by the present invention is that the activated coke produced in the prior art scheme adopts a one-time carbonization method, so that the substances in the coal raw material are not volatilized enough to form medium and large pores, which is not suitable for water treatment. , thus proposing a method of preparing activated coke for water treatment with medium and large pores by carbonization in stages
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Embodiment 1
[0030] A specific embodiment of a method for preparing activated coke for water treatment according to the present invention is given below, and its production process includes the following steps, such as figure 1 Shown:
[0031] ① After crushing the coal raw material, use a vibrating screen to sieve it to a suitable particle size. Here, the particle size range is 4-8 mesh. The industrial analysis results of the lignite sample are shown in the following table:
[0032] project
moisture
Volatile
Sulfur content
Ash
fixed carbon
value
26.1％
33.0％
0.2％
15％
25.7％
[0033] Volatile matter refers to the components of easily volatile substances contained in coal raw materials. The content of volatile matter and moisture in lignite is relatively high, so the loss on ignition rate is relatively high.
[0034] ②Put the crushed coal raw material into a small fixed-bed preparation furnace for drying and dehydration, from...
Embodiment 2
[0040] As a changeable embodiment, in the step (2), the drying and dehydration temperature is 90-110°C, and the residence time is 60-120 minutes; in the step (3), the temperature in the first stage is 400°C-450°C, The residence time is 60-120 minutes, the temperature of the second stage is 600 ℃-650 ℃, and the residence time is 60-120 minutes; in the step ④, the activator is water vapor, carbon dioxide and ammonia, and the activation temperature is 750 -850℃, the residence time is 60-120 minutes.
[0041] Another specific embodiment of the preparation method of the active coke for water treatment of the present invention, its working process is as follows:
[0042] ① After crushing the coal raw material, use a vibrating screen to sieve it to an appropriate particle size, and the particle size range is selected to be 4-8 mesh;
[0043] ② Add the crushed coal raw material to the carbonization furnace for drying and dehydration, keep the drying and dehydration temperature at 110...
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Abstract
The invention relates to a preparation method of an activated coke for water treatment, which comprises the following steps of: firstly, crushing coal materials until reaching proper particle diameters; then drying and dehydrating the crushed coal materials; then carrying out carbonizing treatment on a dried and dehydrated product in stages to obtain a carbonizing product, wherein the temperature in the first stage is 400-450 DEG C and the residence time is for 60-120min, the temperature in the second stage is 600-650 DEG C and the residence time is for 60-120min; and finally, carrying out activating treatment on the carbonizing product through an activating agent, and then reducing temperature to obtain the activated coke. The invention solves the technical problems that the volatilization of substances in the carbonizing product is not adequate and the large and medium pores can not be formed because the one-off carbonizing mode is utilized for the activated coke produced in the prior art, and the activated coke is not suitable for water treatment, reduces the production cost, and is a preparation method of the activated coke with excellent water treatment property for water treatment by using brown coal as the raw materials.
Description
technical field [0001] The invention relates to a method for preparing active coke, in particular to a method for preparing active coke for water treatment from lignite. Background technique [0002] Water is an important resource for human survival. With the development of industry, water resources are increasingly scarce and water pollution is becoming more and more serious. Therefore, the treatment and reuse of sewage and wastewater is particularly important. Using the adsorption of activated carbon to treat wastewater is a common sewage treatment method. Although activated carbon has good adsorption performance, its price of up to 6,000 to 10,000 yuan per ton limits its use in water treatment projects. It is imminent to develop high-quality and low-cost adsorption material products for large-scale application. [0003] Activated coke is a porous carbonaceous substance and is an adsorbent similar to activated carbon. Since activated coke can be prepared from coal raw ma...
Claims
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