Biochar production processes and product applications.

Claims

OCR06WT1. Biochar, which is characterized by the following weight ratio of raw materials: biochar crystals 16 to 20 parts, community sludge 10 to 14 parts, corn cob 3 to 7 parts, modified agricultural waste 18 to 22 parts, surfactant 0.4 to 0.8 parts, binder 20 to 24 parts, and water 120 to 130 parts. The method of making biochar crystals is: crush cotton stalks into granules for 1 to 2 hours, place in a sealed kiln, the kiln is heated to 500 to 700 degrees Celsius under negative atmospheric pressure 1 and the temperature is maintained for 6 to 9 hours, the kiln is stopped, the negative pressure is maintained, cooled and crystallized to obtain biochar crystals. The method of making modified agricultural waste is: (1) crush cotton stalks, peanut shells and corn straw in order and select granules with a granule size of 60 to 100 mesh and mix the cotton stalk, peanut shell and corn straw granules in a weight ratio of 2-3:1:0.3-0.8 To obtain mixed agricultural waste material (2) Soak the crushed biomass pellets in a sodium hydroxide solution with a mass fraction of 10 to 12%, raise the temperature to 80 to 90 degrees Celsius and boil for 140 to 160 minutes, filter and rinse to neutralize with water to obtain alkaline agricultural waste material (3) Add water to the alkaline agricultural waste material to achieve a moisture content of 62 to 65 wt%, then add microbial composting agents to make compost with aerobic ventilation. The height of the compost is 1.3 to 1.6 m. When the temperature of the compost pile increases to 60-65 degrees Celsius, maintain it for 8 to 10 days, and turn the pile when the temperature increases. The moisture content is then maintained for 6-8 days. Composting is complete; dry the compost to obtain modified agricultural waste material with a moisture content of 40-45%.

2. The biochar described in claim 1, characterized by its microbial decomposition, is a mixture of amylase, yeast, Saccharomyces cerevisiae, and protease with a weight ratio of 1.3-1.5:1:0.4-0.73.The biochar described under claim 1 is characterized by the amount of added microbial binder being 0.2-0.4% by weight of the agricultural waste material after alkalinization.

4. The biochar described under claim 1 is characterized by the method of preparation of the binder consisting of the following steps: (1) Mix 1 part by weight of starch and 3 to 5 parts by weight of water, increase the temperature to 36 to 37 degrees Celsius, add 0.05 to 0.07 parts by weight of sodium chloride and 0.2 to 0.3 parts by weight of water. The heavy sodium hypochlorite is reacted for 6 to 8 hours, the pH adjusted to 11.2 to 11.5, then 0.1 to 0.15 parts by weight of sodium chloride and 0.2 to 0.25 parts by weight of propylene oxide are added, respectively, reacted at 36°C to 37°C for 25 to 30 hours, and the pH is adjusted to neutral and vacuum filtered to obtain the modified dry (2). After mixing the lightweight asphalt emulsion and modified dry with a weight ratio of 0.5-0.8:1:1.2-1.5, stir until homogeneous to obtain the binder.5.The biochar described in Claim 4 is characterized by a particle size of 1-5 micrometers, a specific surface area of ​​20 m² / g to 30 m² / g, and a pore radius of 100 nm-200 nm.

6. The biochar described in Claim 4 is characterized by an asphalt emulsion, specifically BLACKTROL (Registered) HP asphalt emulsion of SHARK Petroleum Technology Services Co., Ltd.

7. The biochar described in Claim 4 is characterized by a surfactant mixture of sodium dodecyl benzene sulfonate, hexadecytrimethylammonium chloride, and fatty alcohol polyoxyethylene ether in a weight ratio of 1:1.5-1.7:0.2-0.

5.

8. The biochar described in Claim 1 is characterized by a moisture content in the community sludge of less than 75%.

9. The biochar production process described in Claim 1 through 8, which is characterized by the following steps: Step 1.Step 1: Add biochar crystals, community sludge, corn cobs, modified agricultural waste, surfactants, binders, and water to a grinder to mix and mature the material for 3 to 4 hours to obtain the composite material. Step 2: Press the composite material into shape. First, dry it at 50 to 55 degrees Celsius for 150 to 170 minutes, then dry it at 110 to 115 degrees Celsius for 80 to 100 minutes and cool it to obtain biochar.

10. Application of the biochar as stated in one of the claims 1 to 8 in the energy industry.