Experiment And Design Of New Energy-saving Hot Stove

With the development of the agricultural economy, the problem of drying the grain has become acute. Grain drying and mechanical equipment related to research, especially in hot gas thermal performance study as a very difficult problem.The safe storage of food and agricultural by-products of a technology is the key to its moisture content to safe moisture content, the use of indirect heating hot blast of air-drying method most widely used. However, the use of various forms of the existence of hot gas pollution of the environment and the shortcomings of low thermal efficiency, so the development of low pollution, high efficiency hot gas is very necessary. With the rapid development of China's economy, energy is becoming increasingly serious, therefore, improve the efficiency of heat source equipment, it is particularly important. In the process of grain drying to reduce drying of the fuel directly to reduce the cost of grain drying cost the most effective way, so that users can be greatly enhanced economic benefits.With the development of our national economy, agriculture will also be the development of large step, the national economy and people's food production and processing industries will also wait until the unprecedented attention. Under such circumstances, we will need more scientific content to the agriculture, food processing industry to move closer to production. At present, the domestic research on the little food drying, food drying used in the study of hot gas and even less, the issues in the country to promote the establishment of a conservation-minded society of the background, the current high-energy hot gas, the shortcomings of low thermal efficiency , design a new energy-saving hot stove, to reduce the cost of grain drying and reduce the volume of unit coal consumption, reduce environmental pollution. In this paper, including the subject of the background and significance of research purposes and research at home and abroad, hot gas profile, design a new structure using new technology energy saving and environmental protection of the hot stove, hot blast stove design to test the calculation of the analysis, conclusions and outlook of the subject, such as a total of 6 chapter. Mainly the following aspects of work:(1) a brief introduction of China's current energy situation and the status of grain drying. And detailed introduction to using hot blast drying food history, current situation and development of hot gas and the gap with foreign countries. Design a domestic hot gas of the main problems encountered and solutions used in this article. Analysis of the design of a hot blast of energy saving and environmental protection purpose and meaning.(2) introduces a hot-blast stove in accordance with different types of fuel, the working parameters and the classification of institutions, and several commonly used focuses on the various parts of hot gas composition, structure and characteristics. Presentation focused on the Tube and Pipe Stove Furnace structure and working principle, set out the main tube for large furnace hot-blast stove, sleeve-type mainly used for small furnace hot-blast stove, the two furnace is grain drying in the hot gas most commonly used, it will be the focus of this paper, furnace.(3) design a new energy-efficient hot-blast stove (SSL-30 diamond-shaped tube coal-fired energy-saving hot stove). A large number of new technologies, the use of the new structure has greatly improved the thermal efficiency of hot gas, a reduction of energy consumption and pollution.â‘ the use of new energy-saving technology arch post-combustion. The use of new energy-saving technology arch, an increase in the furnace of fire-resistant concrete structure, along the arc-shaped arch, arch formed in the secondary combustion chamber. Overcome the incomplete combustion of carbon monoxide, the heat pipe does not take full advantage of the weaknesses, so that after the initial combustion of the flue gas entering the secondary combustion chamber, flue gas in the most harmful substances and incomplete combustion of gases (carbon monoxide, etc.) the secondary combustion chamber can be fully re-combustion, its emissions of harmful ingredients greatly reduced, in line with the requirements of environmental protection. Make full use of energy, reduce pollution. Existing technologies to solve the existing boiler in the combustion of incomplete combustion and emissions of harmful substances problem.â‘¡a new structure of heat recovery burner.SSL-30-designed diamond-shaped tube energy-saving coal-fired hot-blast stove combustion chamber using heat recovery boilers lateral structure, the lateral channel in the smoke have casing, the boiler combustion air enter the outer wall by the boiler boiler itself channel wall a week away distributed into the furnace at the bottom of the heat from the furnace into the combustion chamber. Channel for external use containing insulation 20mm thick cotton wrapped to prevent the partition of heat loss of cold air to enter and also to ensure that the combustion temperature inside the boiler. This design uses a heat recovery and air under the grate, which changed the status of the burning stove, the fire increased the degree of coal and save the fans, greatly reducing the boiler heat loss, an increase of the boiler into the temperature to improve the combustion efficiency of boilers in general can improve boiler thermal efficiency of more than 5%.â‘¢the use of diamond as a heat exchanger tube.The use of diamond-shaped heat exchanger, air heat exchanger tube, compared with 100% pipe wall friction possible thermal erosion, thereby enhancing the heat transfer efficiency of more than 5%, a decrease of consumption, saving energy.â‘£the new structure of heat recovery heat exchanger.The use of heat recovery heat exchanger design. After the first air heat exchanger to absorb heat exchanger outer wall of the heat from re-entering the heat exchanger, this will raise the temperature of cold air into the heat recovery heat exchanger to improve heat transfer efficiency of heat exchangers. Channel cold air parcels 20mm thick middle layer of thermal insulation of the partition with the outside world cotton insulation.Design a new type of hot gas over the use of new technologies and the structure of the four, in theory, to save energy and reduce pollutant emissions and greatly improved thermal efficiency.(4) through the design of diamond-SSL-30 coal-fired energy-saving hot stove pipe for thermal performance testing, to test the hot gas of thermal power, thermal efficiency of thermal technical indicators such as the actual operating conditions, and analysis of test results, compared with the design parameters. Stove come with the design standard in practical operation, the actual thermal efficiency reached 76.07%, significantly more than the national standards and design requirements. Through experiments designed to confirm the right of the hot gas, energy saving effect Obviously, a significant reduction in pollutant emissions. New technology, new design and production structure in line with actual requirements and needs, meet and exceed the design is expected to effect significant, it is a large-scale application.(5) through the SSL-30 coal-fired energy-saving hot stove pipe diamond design and test and operational analysis of the advantages and disadvantages of the hot stove, and future research to improve vision, and summarized. The design of diamond-SSL-30 coal-fired energy-saving hot stove pipe is a small hand-burning hot stove, in the course of the experiment found that the use of small hand-Boiler, artificial clearance of coal slag filling, the boiler temperature is not easy to control, resulting in a high boiler temperature suddenly then low, a large range of workers pay no attention to slightly more than the boiler temperature, it is easy to set temperature, leading to instability in the output air temperature can easily damage the boiler and heat exchanger, furnace burning in the machine will be used to better effect. Structure and design of energy-saving technology in small and reliable application of hot gas. However, the use of most of China's large and medium-sized hot-blast stove for hot gas, the application of these technologies on large and medium-sized hot gas, reducing coal consumption will greatly reduce environmental pollution, increase thermal efficiency and reduce carbon dioxide emissions, energy saving and environmental protection play the purpose of reducing grain drying costs, social and practical value of agricultural production will be the true sense of the harvest.