In recent years, influenced by the national “energy saving and emission reduction†policy, infrared cookers have gradually attracted the attention of the public. The infrared energy-saving cooker uses a new air premixed combustion technology. After the gas is completely mixed with the air, it is burned on a radiant combustion plate with several thousand fire holes, and the combustion is sufficient, which can effectively suppress the generation and emission of CO and NOx. Through the inspection and appraisal of the AQSIQ, it is confirmed that the CO and NOx emitted by the infrared gas stove are reduced by 90% and 70% respectively compared with the traditional atmospheric gas stove. It can be seen that the use of the infrared gas stove can reduce the smoke to the fund project: Changsha University of Science and Technology The research-oriented learning and innovation of college students, the ratio of grid cells in the heat collecting circle is 3:2:4. mi commercial division structure 2.3 simulation results analysis It is known that after the combustion reaches a steady state, the porous medium along the Z The axial direction is obviously three areas, namely the preheating zone (0~0.006m). The combustion is calculated, the maximum temperature of the combustion zone is 1570K, the temperature of the upper plate surface is about 1130K, and the temperature of the lower plate surface is about 310K, such as And, close to the actual situation of the infrared gas stove, which indicates that the established model has a certain feasibility.
2.4 The combustion characteristics of gas stoves, the temperature unit is K, and the temperature field of the section is observed.
The temperature/K burn of the new infrared gas stove with a section height from the ceramic plate height of the traditional infrared gas stove. When the cooker is not completely burned, the flue gas contains CO, CH4, H2 and other components, but since the content of CH4 and H2 is much less than (3), the CO content in the project is often counted as incomplete combustion in the flue gas. The amount of product.
this.
Under certain other conditions, the consumption of natural gas or liquefied gas and the time required to reach the same water temperature indicate the time and gas consumption of the three gas stoves in the temperature range of 30~100T (room temperature 11.6). The initial temperature of water 11.7T) T / 弋 traditional atmospheric gas stove traditional infrared gas stove new infrared gas stove stove average thermal efficiency. The average thermal efficiencies of traditional atmospheric gas stoves, traditional infrared gas stoves and new infrared gas stoves calculated by equation (1) are 48.21%, 59.18% and 62.56%, respectively. It can be seen that the thermal efficiency of the new infrared gas stoves is increased compared with the traditional infrared gas stoves. About 3.38%, as shown, is close to the simulation results. And through the thermal efficiency experiment, it can be found that the new infrared gas stove takes less than 1/10 of the time to heat the same water than the traditional infrared gas stove, and the gas utilization rate is greatly improved.
The volume fraction of CO in the traditional atmospheric gas stove, the traditional infrared gas stove and the new infrared gas stove dry flue gas is calculated by formula (2) as sixio'ueo-sogio-1, 3xio', which indicates that the new infrared gas stove emits flue gas. The CO content in the gas is 60% lower than that of the conventional infrared gas stove. Due to the high pot holder of the conventional atmospheric cooker, the gas collector cannot sufficiently absorb the dry flue gas generated, resulting in a low percentage of measured CO. At the same time, in the case where the pot holder is made high and the thermal efficiency is sacrificed, the edge change of the flame is ensured to be small, so that the incomplete combustion is small and the CO emission is low, so the measured data is not included in the comparison range.
The thermal efficiency of the new infrared gas stove is about 3.38% higher than that of the traditional infrared gas stove. Taking Hunan Province as an example, it can save about 525 million m3 of gas per year, equivalent to 567,875 tons of standard coal, while reducing its production cost, which can drive domestic gas appliances. The development of the manufacturing industry. Therefore, the promotion and use of new infrared gas stoves is of great social, economic and environmental significance.
3 Conclusion The new type of heat collecting circle combined with infrared energy-saving gas stove head, through numerical simulation research to determine the various specifications of the stove head, and carried out thermal efficiency experiments and smoke CO concentration determination experiments.
Through the contrast experiment of traditional infrared gas stove and new infrared gas stove, the thermal efficiency of this product is increased by 3.38% compared with the traditional infrared cooker, and the CO concentration in the flue gas is reduced by 60%. The experimental results show that the new infrared gas stove is more than various types. Traditional stoves save resources and protect the environment. The new infrared gas stoves have broad market prospects.
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