NGHIÊN CỨU TÁCH SiO2 TRONG THAN TRẤU BẰNG PHƯƠNG PHÁP CƠ HỌC

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Tác giả: Mạnh Hà Ngô, Hồng Thanh Nguyễn, Văn Khánh Vũ

Ngôn ngữ: Vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học và Công nghệ Đại học Thái Nguyên, 2019

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Bộ sưu tập: Metadata

ID: 413448

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Chủ đề

Ở Việt Nam hàng năm thải ra môi trường khoảng 8,4 triệu tấn trấu. Vì vậy, cần nghiên cứu sử dụng vỏ trấu hiệu quả, tránh lãng phí và ô nhiễm môi trường là hết sức cần thiết. Than hóa vỏ trấu để làm vật liệu trong các dây truyền làm chất lọc nước, sản xuất etanol, chất độn, chất phụ gia, than hoạt tính, chất bán dẫn...là một hướng mới. Tuy nhiên, trong than trấu có 55%C và 45%SiO2 vì thế cần nghiên cứu tách hai chất này để nâng cao hiệu quả ứng dụng. Khá nhiều đề tài nghiên cứu tách hai chất ra, tuy nhiên các phương pháp thường chỉ lấy được một trong hai chất, đồng thời lại thải ra môi trường một lượng lớn hóa chất khác trong quá trình tách. Nghiên cứu tách SiO2 trong than trấu bằng phương pháp cơ học sẽ khắc phục được những nhược điểm trên. Quá trình tách bằng phương pháp cơ học bước đầu đã cho kết quả, với phần than trấu giàu C tỷ lệ SiO2 giảm nhiều nhất là 8% và ở phần giàu SiO2 hàm lượng C giảm nhiều nhất 11% so với thành phần than trấu ban đầu khi ở chế độ hút với lưu lượng khí 0,23m3/h., Tóm tắt tiếng anh, In Viet Nam, about 8.4 million tons of rice husks are released into the environment every year. Therefore, it is necessary to study the effective use of rice husks, avoid waste and environmental pollution. Coal husk charcoal to make materials in the lines as a water filter, ethanol production, fillers, additives, activated carbon, semiconductors...is a new direction. In rice husk charcoal, there are 55% C and 45% SiO2 soit is necessary to study and separate two substances to improve application efficiency. Many topics research separation process but only get one of two substances while discharging a large number of other chemicals during the separationprocess. The research of separating SiO2 in rice husk charcoal by the mechanical method will overcome these disadvantages. The initial mechanical separation process has yielded results, with the rich C coal, the SiO2 ratio has decreased the most by 8% and in the rich SiO2, the C content has decreased by 11% compared to the original rice husk with suction force airflow 0.23 m3/h.

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