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Recyclable biological carbon block and preparation method thereof

A technology of biochar and extrusion granulation, which is applied in the direction of biofuel, carbon preparation/purification, fertilizer mixture, etc., and can solve problems such as difficult recycling and easy disintegration and fragmentation of biochar

Active Publication Date: 2021-05-18
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a recyclable biochar block, which solves the problem that the biochar in the prior art is easy to disintegrate and fragment, and is difficult to recycle.

Method used

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  • Recyclable biological carbon block and preparation method thereof
  • Recyclable biological carbon block and preparation method thereof

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preparation example Construction

[0022] A kind of preparation method of recyclable biochar block of the present invention is implemented according to the following steps:

[0023] Step 1, weighing 25-28% of wood material, 22-28% of dry organic sludge, 25-27% of traditional Chinese medicine residue, 10-23% of sodium silicate, 5-7% of CMC-Na, the mass percentage of the above raw materials The sum is 100%;

[0024] Step 2, pulverizing the woody material, dried organic sludge, and traditional Chinese medicine residue into a solid powder mixture A with a particle size of 40-100 mesh, and sieving it for later use;

[0025] Step 3. Sodium silicate is prepared as a solution with a mass percentage of 15-30%, and CMC-Na is prepared as a solution with a mass percentage of 2-3%. After the above solution is mixed with the solid powder mixture A, pass 18 - Extrusion granulation with 22-mesh mesh, the obtained granules are dried at 55-95°C, and pressed in a mold with a pressure of 30-35KN.

[0026] Step 4. Treat the bioch...

Embodiment 1

[0028] Step 1, weighing 28% of garden prunings, 28% of dried organic sludge, 27% of discarded traditional Chinese medicine residues, 10% of sodium silicate, and 7% of CMC-Na. The sum of the mass percentages of the above raw materials is 100%.

[0029] Step 2. Grinding and sieving: crushing garden pruning, dried organic sludge, and discarded traditional Chinese medicine residue into a solid powder mixture A with a particle size of 40 meshes, and the sieved solid powder mixture A for later use.

[0030] Step 3, granulation and tabletting: the sodium silicate is prepared as a solution with a mass percentage of 15%, and the CMC-Na is prepared as a solution with a mass percentage of 3%. After the above solution is mixed with the solid powder mixture A, pass Extrusion granulation with 18-mesh mesh, the obtained granules were dried at 55°C, and pressed in a mold with a pressure of 30KN.

[0031] Step 4. Treat the biochar material obtained in the above step 3 under nitrogen protection...

Embodiment 2

[0033] Step 1. Weigh 25% of corncobs, 22% of dried organic sludge, 25% of discarded traditional Chinese medicine residues, 23% of sodium silicate, and 5% of CMC-Na. The sum of the mass percentages of the above raw materials is 100%.

[0034] Step 2. Grinding and sieving: crushing garden pruning, dried organic sludge, and waste traditional Chinese medicine residue into a solid powder mixture A with a particle size of 100 meshes, and sieving the solid powder mixture A for later use.

[0035] Step 3, granulation and tabletting: prepare sodium silicate as a solution with a mass percentage of 30%, and CMC-Na as a solution with a mass percentage of 2%, after mixing the above solution and solid powder mixture A uniformly, pass Extrusion granulation with 22-mesh mesh, the obtained granules were dried at 95°C, and pressed in a mold with a pressure of 35KN.

[0036] Step 4. Treat the biochar material obtained in the above step 3 under nitrogen protection at 300° C. for 6 hours to obtain...

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Abstract

The invention discloses a recyclable biological carbon block which is prepared from the following components in percentage by mass: 25-28% of a wood material, 22-28% of dry organic sludge, 25-27% of traditional Chinese medicine residues, 10-23% of sodium silicate and 5-7% of CMC-Na, the total the mass percentages of the components being 100%. The invention also discloses a preparation method of the biochar block. The preparation method comprises the following steps: weighing all the materials; crushing and sieving the materials to form a solid powder mixture A; preparing a solution, mixing the solution with A, performing extrusive granulation, drying the granules and pressing the granules into tablets; and performing high-temperature treatment to form the product. The recoverable biochar block prepared by the invention has the advantages of large specific gravity, high hydrophilic degree, porous water absorption, no disintegration in water and effective release of carbon element, can enter a plough layer along with soil turning in use, is recovered by exposing the earth surface after soil turning, and also can be used in paddy fields, wet lands and other environments in a manner of sunken net.

Description

technical field [0001] The invention belongs to the technical field of biochar, relates to a recyclable biochar block, and also relates to a preparation method of the recyclable biochar block. Background technique [0002] In recent years, biochar prepared from waste biomass under high temperature and anoxic conditions has attracted attention as a soil conditioner. Biochar can effectively improve soil fertility and help plants grow. Moreover, when biochar is used in soil, its porous adsorption properties can also effectively fix harmful substances such as heavy metals in the soil, so as to reduce pollution and return carbon to the soil. [0003] However, in the practical application of biochar, under normal conditions, biochar powder, biochar particles, and biochar blocks will gradually disintegrate in the soil, making it difficult to recycle. As a result, biochar still remains in the soil after adsorbing and fixing heavy metals, making it difficult to recycle. Contents o...

Claims

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Application Information

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IPC IPC(8): C01B32/05C05D9/00C05G3/80
CPCC01B32/05C05D9/00C05G3/80Y02E50/10
Inventor 沈文吴尚宁远兰敖芬
Owner SHAANXI UNIV OF SCI & TECH
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