The waste heat boiler production status of boiler manufacturing enterprises in Zhejiang Province was analyzed in this paper.Based on the analysis,the advantages and disadvantages of some leading enterprises were indicated.Both the technical capacity and output of Zhejiang Province e.g.are the first in China.But the product quality is relatively low,the product structure is unreasonable,and the development of boiler industry is unbalanced.A statistical analysis of mass data on the industries such as gas turbine combined cycle power generation,cement,steel,glass,coking etc.showed that the development of the market for waste heat boilers will be accelerated and the development prospects are broad along with the advancement of national energy saving and emission reduction policies.

Source

Cite

Citations (0)

Scalable, Flexible, and Highly Transmission Sweet Sorghum Film

ACS Sustainable Chemistry & Engineering (2023)

Kaiwen Chen Yujing Tan Fengze Sun Jianyi Zhu Hui Peng

As a nonfood crop, sweet sorghum has been extensively utilized for sugar production and biomass energy conversion. However, industrial production generates a significant amount of sweet sorghum skin. Although paper and cellulose-based films are commonly prepared through a bottom-up approach to capitalize on their abundant cellulose content. The bottom-up approach often involves the use of substantial quantities of chemical reagents, thereby posing a serious threat to environmental safety. In this study, inspired by the arrangement of traditional Chinese house roof tiles, we employed a stacking and hot-pressing preparation strategy to transform sweet sorghum skins into flexible sweet sorghum films (SF). SF retained the high degree of orientation of cellulose while obtaining high strength and toughness along with excellent light transmission properties. In particular, the mechanical properties of SF in the direction parallel to the fibers are exceptionally remarkable. The tensile strength measured 796.4 MPa, while the toughness stands at 7.63 MJ/m3. Additionally, SF exhibited outstanding optical characteristics, boasting a remarkable light transmission of 78% and a haze of 60%. Moreover, we established the feasibility of utilizing SF as a functional material for various applications, showcasing its potential for optical management, smart wearables, and electronic devices. Importantly, the successful preparation of large-size SF unlocked possibilities for their widespread and large-scale utilization, thus making a valuable contribution to environmental sustainability.

10.1021/acssuschemeng.3c04369

Cite

Citations (1)

Property Enhancement of Wood-Rubber Composites by Microwave Treatment of Rubber Particles

Wood and Fiber Science (2014)

Min Xu Jian Li Sheldon Q. Shi Liping Cai

In this study, a microwave oven with a frequency of 2450 MHz was used for the surface modification of rubber particles. The samples were treated with five different output powers (160, 320, 480, 640, and 800 W) for six exposure times (1, 2, 3, 4, 5, and 6 min). The influence of the microwave treatment on rubber characteristics was analyzed by Fourier transform infrared spectroscopy. The wood-rubber composites were fabricated using 70% poplar particles and 30% rubber particles. Four regression equations, ie radiation time and power as functions of modulus of rupture, modulus of elasticity, internal bond, and thickness swelling, were developed and a nonlinear programing model was derived to obtain the optimum panel properties. The results from contact angle measurements and microscopic analysis indicated that the surface characteristics were changed after the microwave treatment, improving the mechanical properties of the wood-rubber composites.

Source

Cite

Citations (3)

Effects of thermal modification on mechanical and swelling properties and color change of lumber killed by mountain pine beetle

BioResources (2012)

Cai JiaBin Liping Cai

To extend the application of mountain pine beetle (MPB) killed lumber for decking, siding, and landscaping materials, it is essential to improve its dimensional stability. Thermal treatment is one of the well-established processes used to improve wood stability by modifying chemical compounds and masking blue-stains by darkening the fibre color. In this study, the MPB lumber was subjected to thermal treatment at three temperatures (195, 205, or 215°C) and three exposure times (1.5, 2, or 3 h). Based on Duncan’s multiple range test, the results indicated that the volumetric swelling after thermal treatment, either from oven-dry to air-conditioned or from oven-dry to water-saturated, was significantly reduced after thermal treatment. Modulus of elasticity was increased when specimens were treated at a temperature of 195°C, and then decreased as the temperature increased. Modulus of rupture was significantly reduced as treatment temperature increased. The hardness of lumber thermal-treated at 195°C was significantly increased compared to that of the untreated lumber. At higher temperatures, hardness started to decrease slightly. With the treatment temperature increasing to 215°C for 3 h, the color difference between stained and clear wood was reduced by 75%. As a result, the blue-stains vanished gradually.

Thermal Treatment

Thermal Stability

Mountain pine beetle

10.15376/biores.7.3.3488-3499

Cite

Citations (9)

Modeling and Optimization of Fiber Quality and Energy Consumption during Refining Based on Adaptive Neuro-fuzzy Inference System and Subtractive Clustering

BioResources (2017)

Yunbo Gao Jun Hua Liping Cai Guangwei Chen Na Jia

Refining is a critical step in the manufacturing of medium-density fiberboard (MDF). To ensure fiber quality and control of the energy consumption during refining, proper production parameters, such as feeding screw revolution speed (SR), accumulated chip height (CH), opening ratio of the discharge valve (OV), and content of Chinese poplar (CP), are vital. These parameters were monitored and recorded in an MDF mill to investigate the relationships between the parameters and the fiber quality and energy consumption. In this study, fuzzy models of the fiber quality and the energy consumption during refining were established based on subtractive clustering and an adaptive neuro-fuzzy inference system (ANFIS). The fiber quality and energy consumption models demonstrated high prediction accuracy because their predictive mean relative errors were as low as 4.14% and 6.72%, respectively. The errors of fiber quality were optimized using the simulated annealing method, and the input parameters were obtained. Based on the energy consumption model, the minimum energy consumption was 41.51 kWh/t, on the premise of the minimum requirement of fiber quality. This study can be a guideline for MDF production management to improve fiberboard quality and reduce energy consumption.

Fuzzy inference

Fuzzy inference system

Refining (metallurgy)

10.15376/biores.13.1.789-803

Cite

Citations (3)

Increasing inorganic nanoparticle impregnation efficiency by external pressure for natural fibers

Industrial Crops and Products (2015)

Changlei Xia Sheldon Q. Shi Liping Cai S. Nasrazadani

Kenaf

Sodium carbonate

10.1016/j.indcrop.2015.02.054

Cite

Citations (25)