Design And Experiment On Hot-Blast Heating Stove Of Biomass Briquettes Fuel

With the huge consumption of energy, the fossil energy reducing day by day, seeking the renewable energy is mentioned to the certain program. To develop the biomass briquette fuel, it is economical and feasible road way to the countryside rich straw resources. And its implementation impetus other industries' development in the countryside. Simultaneously the countryside heating is also absorbed the attention.In North China the countryside general areas are the plains and the massive straw is surplus every year. So it results in the huge waste without being used reasonably. At the same time, the countryside heating is out date, though the cities heating facility is rich, they actually are not fit for the countryside. According to instruction characteristic in the countryside, this paper designs hot blast stove as heating equipment. Especially the stove chooses the biomass briquette as the fuel.According to the combustion characteristic of biomass briquette and the thermal energy characteristic parameter, the paper calculates and designs the heating load of the room, the chamber pattern and the volume size, the grate area, the convection exchange parameter to the fire surface and the radiation exchange parameter and so on. After that manufacture the hot blast stove of biomass briquette fuel. According to the processes of the craft manufacture, then making the thermal properties experiment to this hot blast stove and the heating experiment to the whole system. By the experiments the paper gets the conclusions as following:1. Because the radiation loss is bigger, in the pro and con thermal equilibrium experiment the thermal efficiency is 55.85%, but this hot-blast stove is in the room , so the quantity of radiation loss in the room is effectively used, therefore its heating efficiency may achieve 80.86%, the indexes of stove completely meets the design requirements2. Through the stationing and the average calculating method, measuring the chamber's temperature, it is 650℃, so chamber's structural design is generally reasonable;3. Through the heating experiment in the room, the hot-blast temperatureachieved 100℃ , during the certain time the indoor temperature can achieve 18 ℃, meeting the needs of indoor heating ;4. The open style radiator has avoided the partial radiation and the hot blast inhigh speed .To a certain extent it has made up the flaws which the hot blast heating exits.5. With the KM9106 combustion gas analyzer determination haze content, SO₂ and NO_x density are little and possible to ignore, the CO density achieves the national environmental protection target.