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Preparation method of double-high carbon

A technology of high-carbon and mixed materials, applied in the direction of solid fuel, biofuel, waste fuel, etc., can solve the problems of clogging the outlet ventilation system or the bottom screw cone, low mechanical strength, extrusion and crushing into powder, etc., to achieve Solve the effects of insufficient combustion, reduce emissions, and facilitate recycling

Pending Publication Date: 2021-12-17
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because biochar is fragile and its mechanical strength is not high, when it is mixed with limestone and added to the shaft kiln for calcination, it is very easy to be squeezed and broken into powder, and it is very easy to cause problems such as blocking the ventilation system of the discharge port or the bottom screw cone. There are also certain technical difficulties in the application of biochar in calcined lime

Method used

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  • Preparation method of double-high carbon
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  • Preparation method of double-high carbon

Examples

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preparation example Construction

[0038] The invention discloses a preparation method of double-high charcoal, which is prepared by crushing straw, adding additives, drying, shaping and carbonizing. The equipment used includes a pulverizer, a supergravity mixer, a two-stage screw molding machine and a carbonization furnace. The outlet of the pulverizer is connected to the supergravity mixer, the supergravity mixer is connected to the inlet of the double-stage screw extruder, and the outlet of the double-stage screw extruder is connected to the inlet of the carbonization furnace. The connection is connected by a conveyor belt.

[0039] Straw includes cane pith, various crop straws, wood residue, bark and other plant fiber raw materials. The gravity mixer is a double-shaft mixer with a motor power of 7.5KW, a blade diameter of 400mm, a blade speed of 47.6r / min, and a maximum processing capacity of 1000kg / h. The two-stage screw molding machine is a JZK series two-stage vacuum extruder, and its basic structure i...

Embodiment 1

[0042] An example of the preparation method of a kind of double high charcoal described in the present invention, comprises the steps:

[0043] (1) Pulverization: wood slag is sent into the pulverizer and stirred and cut for 10min, the stirring speed is 50r / min, and the broken wood particles of 1mm are obtained after cutting;

[0044] (2) Add additives: take the following raw materials by weight percentage: 5% calcium oxide, 3% calcium sulfate, 1.5% urea, and 0.5% dextrin are added to 90% of the 200 mesh mass ratio The mixture is obtained from wood pellets;

[0045](3) Stirring: put the mixture in step (2) into a supergravity mixer, stir for 50 minutes, and the blending speed is 600r / min, then take it out, the surface moisture content is 1%, and set aside;

[0046] (4) Shaping: the material in step (3) is sent into a twin-stage screw molding machine for pressing.

[0047] (5) Carbonization molding: send the material in step (4) into a carbonization furnace for carbonization....

Embodiment 2

[0054] This embodiment is another example of the preparation method of double high charcoal according to the present invention, comprising the following steps:

[0055] (1) Pulverization: send the cane pith into a pulverizer to stir and cut for 10 minutes, the stirring speed is 45r / min, and obtain 1mm cane pith particles after cutting;

[0056] (2) Adding additives: take the following raw materials in percentage by weight: the 150 mesh mass ratio of 7% is 95% calcium oxide, 4% calcium sulfate, 2% ammonium bicarbonate, and 1% water glass is added to 86 The mixture is obtained in the sugarcane pith granules of %;

[0057] (3) Stirring: put the mixture in step (2) into a supergravity mixer, stir for 45 minutes, and the blending speed is 550r / min, then take it out, the surface moisture content is 1%, and set aside;

[0058] (4) Shaping: the material in step (3) is sent into a twin-stage screw molding machine for pressing.

[0059] (5) Carbonization molding: send the material in ...

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Abstract

The invention discloses a preparation method of double-high carbon, which comprises the steps of crushing straws, wood residues and bagasse pith, adding additives, stirring, shaping, carbonizing and forming. The additives comprise calcium oxide, calcium sulfate, a swelling agent and a structure modifier. Related equipment comprise a crusher, a supergravity stirrer, a two-stage screw molding machine and a carbonization furnace. A discharge port of the crusher is connected with the supergravity stirrer, the supergravity stirrer is connected with a feed port of the two-stage screw extruder, and a discharge port of the two-stage screw extruder is connected with an inlet of the carbonization furnace. By using the method, renewable resource utilization of straws, wood residues, bagasse pith and the like can be realized, and the prepared double-high carbon can replace traditional fossil energy and is used as fuel for calcining lime, so that the quality and the activity of the lime can be effectively improved, the use amount of the fossil energy in the calcined lime can be reduced, the energy consumption can be reduced, and the emission of pollutants can be reduced.

Description

technical field [0001] The invention belongs to the field of environment-friendly and renewable energy utilization of calcined lime, and in particular relates to a preparation method of double-high charcoal. Background technique [0002] Biochar is also known as machine-made charcoal, regenerated charcoal, artificial charcoal, and smokeless refined charcoal. It is made of wood or plant fiber scraps through extrusion processing, high temperature carbonization, and processed into carbonaceous rods. According to the shape, it can be divided into triangular, quadrangular, pentagonal and hexagonal hollow biochar; according to its carbonization temperature, it can be divided into high-temperature charcoal, medium-temperature charcoal and low-temperature charcoal. The difference is: high-temperature charcoal is quickly fired in a high-temperature furnace (carbonization temperature above 800°C), and its texture is hard and dense, and it can sink in water. It has a large carbon con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L5/44C10L9/10C04B2/10
CPCC10L5/447C10L9/10C04B2/10C10L2290/28C10L2290/24C10L2290/32Y02E50/10Y02E50/30
Inventor 杨靖窦明远邹帅李浩铭滕家皇邓富康李康春黄福川
Owner GUANGXI UNIV
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