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Active brown coal and preparation method thereof

A coal and active technology, applied in the field of active lignite and its preparation, can solve the problems of poor biological activity and high cost, and achieve the effect of developed macroporous pore structure, low cost and high catalytic activity

Active Publication Date: 2012-07-18
HUANENG CLEAN ENERGY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcoming that above-mentioned prior art exists, the object of the present invention is to provide a kind of sewage treatment active lignite and preparation method thereof, the preparation method of active lignite of the present invention is simple, the active lignite of preparation has catalytic activity height, and cost is low It solves the technical difficulties of poor biological activity and high cost of existing activated carbon used in sewage treatment

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  • Active brown coal and preparation method thereof
  • Active brown coal and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0018] The raw material selects Zhalainuoer lignite with ash content of about 8% and moisture content of 35%. The preparation method of active lignite is as shown in the accompanying drawings, including the following steps:

[0019] Step 1: Crushing and sieving of lignite raw coal: crushing and sieving the Zhalai Nuoer lignite into wide sieving particles with a diameter of less than 50 mm;

[0020] Step 2: Integrated treatment of carbonization, oxidation, and activation: Send the crushed and screened particles into an integrated upgrading reactor for integrated treatment of carbonization, oxidation, and activation under reducing atmosphere conditions, and the integrated upgrading reactor The internal temperature is 400°C, the fluidization velocity is 2m / s, and the processing time is 10min to obtain the finished product;

[0021] Step 3: Cooling and lowering the temperature: the finished product from the integrated upgrading reactor in step 2 is anaerobically cooled to 50°C thr...

Embodiment 2

[0025] The raw material selects Yimin lignite with ash content of about 12% and moisture content of 40%. The preparation method of active lignite is as shown in the accompanying drawing, including the following steps:

[0026] Step 1: Crushing and sieving of lignite raw coal: crushing and sieving the Zhalai Nuoer lignite into wide sieving particles with a diameter of less than 50 mm;

[0027] Step 2: Integrated treatment of carbonization, oxidation, and activation: Send the crushed and screened particles into an integrated upgrading reactor for integrated treatment of carbonization, oxidation, and activation under reducing atmosphere conditions, and the integrated upgrading reactor The internal temperature is 550°C, the fluidization velocity is 3.5m / s, and the processing time is 8min to obtain the finished product;

[0028] Step 3: cooling down: the finished product from the integrated upgrading reactor in step 2 is anaerobically cooled to 40°C through the finished product coo...

Embodiment 3

[0032] The raw material is selected from Baorixile lignite with an ash content of about 8% and a water content of 31%. The preparation method of the active lignite is shown in the accompanying drawing, including the following steps:

[0033] Step 1: Crushing and sieving of lignite raw coal: crushing and sieving the Zhalai Nuoer lignite into wide sieving particles with a diameter of less than 50 mm;

[0034] Step 2: Integrated treatment of carbonization, oxidation, and activation: Send the crushed and screened particles into an integrated upgrading reactor for integrated treatment of carbonization, oxidation, and activation under reducing atmosphere conditions, and the integrated upgrading reactor The temperature inside is 700°C, the fluidization velocity is 8m / s, and the processing time is 6min to obtain the finished product;

[0035] Step 3: Cooling and cooling: the finished product from the integrated upgrading reactor in step 2 is anaerobically cooled to 35°C through the fi...

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Abstract

The invention discloses active brown coal and a preparation method thereof. Technical indicators of the active brown coal are as follows: an iodine value ranges from 300mg / g to 600mg / g; stacking density ranges from 450kg / m<3> and 700kg / m<3>; a phenol value is more than 100%; a PH value ranges from 6 to 9; a macropore ratio ranges from 80% to 90%; and granularity Dmax is less than 1mm. The preparation method comprises the following steps that: raw coal of the brown coal is crushed and screened, and particles after crushing and screening are subjected to integration processing of carbonization, oxidization and activation, then cooled and finally sealed and packaged. The active brown coal preparation method is simple; the prepared active brown coal has the advantages of being stable in property, developed in macropore structure, applicable to adhesion, auxiliary vitality and growth of microorganisms, rich in surface chemical functional group, high in catalytic activity and low in cost; and the prepared active brown coal can be adopted as a substitute of the conventional active carbon to be used in the sewage treatment field and solves the problem that the conventional active carbon is poor in bioactivity and high in cost when being used in the sewage treatment.

Description

technical field [0001] The invention relates to the technical field of active lignite, in particular to an active lignite and a preparation method thereof. Background technique [0002] Water is the source of life, and ensuring the quality of water sources is the basis for ensuring the health and safety of the people. However, in recent decades, as my country's economy has entered a stage of rapid growth, environmental pollution has become increasingly serious, and water quality problems have become increasingly prominent. How to purify sewage economically and efficiently is a difficult problem. [0003] At present, there are a large number of sewage treatment processes using activated carbon as a carrier at home and abroad, but the price of activated carbon is relatively expensive (the average price of conventional activated carbon is 5,000 yuan / ton), the treatment cost is very high, and it is difficult to promote and apply on a large scale. Abundant and cheap adsorption p...

Claims

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Application Information

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IPC IPC(8): C01B31/02C02F1/28C02F3/00C01B32/33C01B32/336
Inventor 肖平江建忠李强徐正泉蒋敏华
Owner HUANENG CLEAN ENERGY RES INST
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