Straw, known as Ligusticum lancea in ancient times, also known as straw grass, refers to the stem and leaf parts remaining after the threshing of the grass crops such as rice, wheat, and corn. Among them, the straw of rice is often called straw and rice straw, and the straw of wheat is called Wheat straw. In mid-to-late May, it is harvest time again. Both the early rice in the south and the wheat in the north have reached the harvest time, and the summer harvest work in various regions is also in full swing. This year, the smell of dense smoke in the air is less, and the straw becomes a treasure instead of being burnt. The phenomenon of open burning of crop straw in the city of Hefei is effectively controlled, and the smoke and dust pollution caused by open burning of crop straw is basically eliminated. The comprehensive utilization rate of crop straw reached 88.3%, 4.9 percentage points higher than the provincial average, and achieved results.
In recent years, Hefei has actively explored straw comprehensive utilization technology and actively developed straw comprehensive utilization industry. According to statistics, there are currently more than 30 enterprises (institutions) of various types of comprehensive utilization of straw, covering the entire industrial chain of technology research and development, equipment manufacturing, "five chemical" utilization, collection, storage, transportation and sales, with an annual output value of 400 million yuan and annual industrialization utilization. The local crop straw reached more than 200,000 tons.
As a big agricultural city, Hefei is very rich in crop straw resources. According to statistics, the city's annual crop planting area is about 11 million mu, and the annual output of crop straw is about 4 million tons. Straw as a by-product of agriculture is not only an agricultural non-point source of pollution, but also an important biomass resource. Hefei has carried out long-term exploration and practice on how to make good use of and transform crop straws to turn waste into treasure, control open burning of straws, and reduce air pollution. At the same time, Hefei also insists on the comprehensive utilization of straw as a major issue to study, based on the development of large resources, cultivate large industries, focus on promoting the industrialization of straw comprehensive utilization, and vigorously develop a modern environmental protection industry based on the utilization of crop straw resources.
The application of straw dryer has promoted the development of deep processing of straw and greatly expanded the use of straw. Nanyang environmental protection straw dryer can quickly dehydrate and dry fresh straw. The dried straw can be formed into a high-density pellet fuel by a biomass fuel pelletizer, which can be used to generate electricity, etc., and reduce the environment caused by the unavailability of straw. Pollution can also generate income. Nanyang environmental protection straw dryer is a new type of agricultural drying equipment, which is widely used for drying and dewatering agricultural cellulose materials such as corn straw, soybean straw, cotton straw, wheat straw, sorghum straw, rice straw, etc. It is one of the key equipment to solve the comprehensive utilization of crop straw.
As the environmental problems caused by the large-scale use of fossil fuels become more and more serious, governments of various countries begin to care about and pay attention to the development and utilization of biomass power sources. Although the natural conditions and technical levels vary greatly from country to country, and the utilization of biomass energy varies greatly, in general, the future development of biomass energy will play an important role, especially with straw biomass as a typical representative, and The primary energy system occupies a stable proportion and an important position.
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