Unlock instant, AI-driven research and patent intelligence for your innovation.
A method for preparing coal-based activated carbon with flue gas internal circulation
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of coal-based activated carbon and internal circulation, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve problems such as difficulty in effectively achieving the expected effect of pre-oxidation, and achieve the effect of improving strength and wide adaptability
Active Publication Date: 2018-01-16
CHNA ENERGY INVESTMENT CORP LTD +1
View PDF9 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0012] However, for high-strength molded pellets, research suggests that using air directly as an oxidant is not the best choice, and it is difficult to effectively achieve the desired effect of pre-oxidation
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0059](1), Xinjiang Hami coal is pulverized to coal powder with an average particle size of 29 μm, and sieved, wherein the content of coal powder with a particle size greater than 80 μm is 2.5 wt %; the content of coal powder with a particle size greater than 40 μm is 28 wt %;
[0060] (2), send the pulverized coal obtained in (1) into the feed bin of the briquette forming equipment, and carry out degassing treatment to the material in the feed bin, keep the negative pressure in the feed bin At 2.5kPa~3kPa;
[0061] (3) Keep the temperature of the material in the feeding bin at 50°C to 55°C, and adjust the moisture content to 7wt to 8wt%;
[0062] (4), the material in the feeding bin is sent into the molding equipment through the screw forced feeder for molding, and the linear pressure between the rollers is about 11-12t / cm during molding, so as to obtain the molding briquette (type coal).
[0065] The difference from Example 1 is that the raw coal is a mixture of Xinjiang Hami coal and Heishan mining area longbituminous coal in a mass ratio of 1:1.
[0068] (1) Mix Xinjiang Hami coal and Heishan mining area longbituminous coal uniformly at a mass ratio of 1:1, and crush to coal powder with an average particle size of 35 μm, and then sieve, wherein the content of coal powder with a particle size greater than 80 μm is 8.2 wt%; the content of pulverized coal with a particle size greater than 40 μm is 22wt%;
[0069] (2) Send the pulverized coal obtained in (1) into the mixing chamber for stirring and degassing. The top of the mixing chamber is equipped with an air extraction pipeline to make the density of the pulverized coal after stirring reach 0.60-0.65kg / L, and then pass through the star valve The pulverized coal in the mixing bin is sent to the feeding bin of the briquetting equipment.
[0070] (3) Carry out degassing treatment to the material in the feed bin, keep the negative pressure in the feed bin at 2.5kPa~3kPa;
[0071] (4), keeping the temperature of the material in the feeding bin at 80°C to 85°C, and adjusting...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Property
Measurement
Unit
particle size
aaaaa
aaaaa
particle diameter
aaaaa
aaaaa
particle diameter
aaaaa
aaaaa
Login to View More
Abstract
The invention discloses a preparation method of coal-based activated carbon for flue gas internal circulation. The preparation method comprises the following steps: preparing coal briquette by carrying out a mounding process on feed coal, breaking and granulating the obtained coal briquette, and sequentially carrying out oxidation treatment, carbonization treatment and activation treatment, so that the activated carbon is obtained. The preparation method disclosed by the invention has the advantages that coal category adaptability in a feed coal mounding process is wide, and even unadhesive coal with the greatest molding difficulty is taken as the feed coal, a coal briquette product with the strength more than 89% can be obtained without adopting any adhesive; meanwhile, the air is mixed with flue gas containing a large amount of carbon dioxide and steam to obtain an oxidant, oxidation treatment effect can not be reduced due to introduction of a large amount of reducing steam and carbon dioxide, instead better oxidation effect can be obtained for moulding aggregates with relatively high strength, and further quality of the activated carbon can be correspondingly improved.
Description
technical field [0001] The invention belongs to the field of coal-based activated carbon production, in particular to a method for preparing coal-based activated carbon with flue gas internal circulation. Background technique [0002] Since the industrial revolution, humans have used fossil energy on a large scale, which has had a huge and irreversible adverse impact on our ecological environment. Especially in the new century, the greenhouse effect is becoming increasingly severe, extreme weather emerges in endlessly, and environmental pollution continues to intensify. In this context, countries around the world generally adjust their energy policies and devote themselves to the development of environmentally friendly energy utilization methods. [0003] In the production of activated carbon, the method of preparing coal-based activated carbon with coal as raw material has been widely used. In order to make the obtained activated carbon have high strength when used, it is ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More