A combustion device for the study of soot characteristics in a low-pressure environment

Abstract

The invention provides a combustion device for researching soot characteristics in a low-pressure environment. The combustion device comprises a stainless steel low-pressure sealed cabin, a diffusion flame combustor, a gas mass flow control device, a high-voltage arc ignition device, an observation window, an auxiliary cleaning device, a digital display programmable logic controller (PLC), a vacuum pump group, an operating pressure stabilization device, a balance pressure air source and a detachable calibration tool clamping groove. The vacuum pump air exhaust and the balance pressure air source are simultaneously controlled through the control device in a low-pressure environment in the cabin, so that target pressure of the cabin is achieved. The inflow of two paths of gases of the combustor and the balance pressure air source is controlled by the gas flow controller, and after a pipeline is connected each time, the gas tightness at each joint of gas transport pipelines in the whole system is checked. A pressure meter is designed on a quick release upper flange plate. Operating pressure can be set and is dynamically monitored in real time through a PLC control interface, and the inflow of fuel gas, following wake air and the balance air source can be set.

Description

technical field [0001] The invention belongs to the technical field of measuring characteristics of soot particles of hydrocarbon fuels, in particular, the invention relates to a combustion device for researching soot characteristics in a low-pressure environment. Background technique [0002] The low-pressure and low-oxygen environment in plateau areas such as Tibet inevitably poses a challenge to existing fire protection techniques and architectural design specifications. At present, there is still a lack of in-depth research on the impact of high-altitude environments on the occurrence and development of fires. On the one hand, as the altitude increases, the ambient pressure and oxygen concentration will decrease, which will affect the combustion characteristics of combustibles such as combustion rate, flame and flue gas temperature, and flue gas concentration, and these parameters are very important for building fire safety design. important. One of the most important ...

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Problems solved by technology

Due to the extremely harsh environmental requirements of optical devices, they are more sensitive to vibrations, which can easily cause deviations in the optical path, thus affecting the experimental results

Therefore, if it is necessary to measure the characteristics of soot particles in a low-pressure environment, it is not easy to operate the whole set of optical instruments with a small burner.

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