Combustion Chamber at IEECAS
System Description: the Chinese Academy of Sciences Institute of earth environment and DRI cooperation established a large scale combustion furnace. The system can collect biomass and fossil fuel combustion process, the vehicle emissions of particulate matter and gas observation. The characteristic is that it can control the combustion conditions, the quality of the sample, combustion mode, burning time and burning efficiency can be achieved by the preparatory work. The system in the sampling process can reduce the flue gas emission to the atmosphere causes losses, so as to estimate the source emission data is more accurate. At the same time, the interface of the combustion furnace has a dilution channel, which can be used to collect and monitor the flue gas after dilution and cooling. As shown in Figure 1-1, the volume of the furnace is about 8m3 (1.8m * 1.8m * 2.2m), the main body is made of 3mm thick high temperature resistant aluminum alloy. Chimney in the top of a combustion furnace, chimney installed flow meter measurement of flue gas from the chimney discharged flow rate and dilution sampler is also connected in the chimney, the high temperature flue gas generated by the combustion of the diluted cooled to ambient temperature after by sampling the membrane and on-line monitoring instrument. This system can adjust the air exchange efficiency (exchange rate air) of the combustion furnace by controlling the intake and exhaust gas.
Details of the burner are described as follows: the bottom of the furnace is an air inlet, which is connected with the blower, and the blower is placed in a particulate air filter HEPA (HEPA) filter screen, and the HEPA filter is provided with clean air (Figure 1-2a, b). The top of the burning furnace is provided with a chimney, and a 1/2, 1/4, and a sample of different sizes are arranged on the chimney. The position of the sampling port is satisfied with the sampling method of particulate matter in the exhaust of fixed pollution sources (16157-1996 GB/T), and a sampling port is connected with a flow meter to measure the flow velocity (1-2c, d) of the flue gas from the chimney. The door is closed to prevent the smoke from the flue gas loss (Figure 1-2i).
Test material components: can be in the laboratory to simulate biomass and household coal combustion, and its emissions monitoring and collection, as well as motor vehicle emissions monitoring, analysis, NOx, SO2, CO2, CO, carbon fractions, ion, a unit classification.
Test method and sample requirements: the collection of biomass fuels (such as the origin of wheat, corn, rice, etc.) and domestic coal combustion, each experiment of weight, kindling, fuel form information detailed records; in different moisture content of biomass fuel burning experiments, ahead of 1 ~ 3 days water evenly spread into the straw in the water to fully immersed in the straw. Determination of the water content of the fuel before combustion experiments. Before the start of each experiment, close the combustion furnace door, open the chimney fan to open the intake purification system, pre on combustion furnace air purification; experiment, through the window of the furnace combustion careful observation combustion state and do a good job in the corresponding records; after each experiment are required for combustion furnace for cleaning, to avoid cross contamination caused to the next experiment; regular replacement of air purification system of HEPA filter.
Combustion Chamber at IEECAS