Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2013-02-01

Journal: BIORESOURCES

Included Journals: Scopus、EI、SCIE

Volume: 8

Issue: 1

Page Number: 663-675

ISSN: 1930-2126

Key Words: Rice straw; Wet-briquetting; Specific energy consumption; Die length-diameter ratio; Die opening taper

Abstract: In the normal-temperature (20 to 25 degrees C) wet briquetting of straw, the lignin becomes softened and briquetted by means of friction heat from the briquetting at some compressing force and moisture ratio. With an electronic universal testing machine and a self-developed normal-temperature wet briquetting device, tests were carried out for normal-temperature wet briquetting of rice straws with different compressing rate, material moisture, die length-diameter ratio, and die opening taper, using a quadratic regression-orthogonal design. Based on the characteristic curves of normal-temperature wet briquetting, the specific energy consumption was calculated by stepped regression and then integration for summation. Thereby, a specific energy consumption model was established. Next, an interactive analysis was made between single-factor and two-factor designs. Optimal combination of factors, i.e. 17.3% moisture, 44.5 mm/min compressing rate, 45 degrees die opening taper, and 5.3 die length-diameter ratio, were obtained while the specific energy consumption was minimized. Further, the work provided references for process parameters design of the normal-temperature wet briquetting device for straw.