Development and research of low pressure injection burner for biogas combustion

The article is devoted to the development of the design of a low-pressure injection burner equipped with a thermal divider and the study of the process of distribution of methane concentration and velocity of gas-air mixture velocity in the burner body. The Solid Works Flow Simulation software complex is used to study the process of formation of the gas-air medium in the burner body. The design of a low pressure injection burner with a conical-shaped heat spreader has been developed. Placing the divider in the burner body provides preheating of the gas-air mixture and allows to increase the speed of flame propagation. Computer simulation of the process of gas-air mixture formation in the burner body for 3 burner constructions is performed: without a divider, with a divider length of 11 mm and a divider length of 25,5 mm. As a result of modeling, it is found that the placement of the divider with a length of L = 11 mm does not affect the distribution of methane and the velocity of the gas-air mixture in the burner body and at the exit of the firing holes. Increasing the length of the divider to 25,5 mm leads to an increase in the speed of the gas-air mixture and an increase in the concentration of methane in the firing holes. Therefore, the placement of the burner housing to the heat spreader with a length of 11 mm is the best solution to improve the efficiency and stability of the combustion process.

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Low-pressure injection molding processing of a 316-L stainless steel feedstock

Materials Letters ◽

10.1016/s0167-577x(01)00422-0 ◽

2002 ◽

Vol 52 (4-5) ◽

pp. 360-365 ◽

Cited By ~ 20

Author(s):

M Rei ◽

E.C Milke ◽

R.M Gomes ◽

L Schaeffer ◽

J.P Souza

Keyword(s):

Stainless Steel ◽

Injection Molding ◽

Low Pressure ◽

Pressure Injection ◽

316 L Stainless Steel

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Cost-Effective Ceramic Automotive Components Through Low Pressure Injection Molding

Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 9/10 - Ceramic Engineering and Science Proceedings ◽

10.1002/9780470314234.ch1 ◽

2008 ◽

pp. 691-698 ◽

Cited By ~ 3

Author(s):

James E. Neely ◽

Joel P. Clark

Keyword(s):

Injection Molding ◽

Cost Effective ◽

Low Pressure ◽

Automotive Components ◽

Pressure Injection

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A New Dewaxing Method and its Effect on the Properties of Low-Pressure Injection Molded Ceramics

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.336-338.1012 ◽

2007 ◽

Vol 336-338 ◽

pp. 1012-1016

Author(s):

Yin Wu ◽

Wen Jie Si ◽

He Zhuo Miao

Keyword(s):

Carbon Dioxide ◽

Injection Molding ◽

Bending Strength ◽

Low Pressure ◽

Supercritical Extraction ◽

Paraffin Wax ◽

Organic Additives ◽

Extraction Condition ◽

Pressure Injection ◽

Injection Molded

A new dewaxing method for low-pressure injection molded ceramics is presented. Supercritical extraction with carbon dioxide was used to remove paraffin wax from the ceramic green parts. The composition of organic additives for low-pressure injection molding feedstock and the extraction condition for the green parts were investigated. Moreover, the properties of sintered ceramic samples dewaxed by supercritical carbon dioxide were compared with those by thermal dewaxing. The results show that the new binder system containing 50wt% paraffin wax, 35% bee wax and 15% stearic acid fulfills the requirements of both low-pressure injection molding feedstocks and supercritical dewaxing, where the feedstock has high fluidity, low viscosity and quick solidification. The efficient extraction condition for supercritical dewaxing from the green parts is at 30MPa pressure and 45°C. Under this condition, defect free ceramic green parts can be obtained. Dewaxing methods have significant influence on the properties of sintered parts. The mechanical properties of the sintered sample can be improved by supercritical dewaxing. With this method, the bending strength of sintered samples (σ = 331.6 MPa) is higher than that obtained by thermal treatment (σ = 312.3MPa). The sintered samples dewaxed by supercritical CO2 have shown the property of higher density and less distortion compared to the thermal dewaxing method. Moreover, with supercritical extraction the dewaxing time can be reduced to about one tenth of the time required by thermal dewaxing.

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