1、Annual straw consumption is about 300 (15x20) million tons to 450 (15x30) million tonnes. Around each plant to town for curing Center straw briquette factory, about 30, curing each straw briquette factory production capacity of 10,000 tons per year, production of major products supply power plants a
2、nd the rest as ordinary fuel. Chapter III, section I industry investment analysis investment benefit analysis, industry profitability industry benchmark yield to 12%, more than a moderate level of profitability, have higher profitability. Secondly, solvency, with good profitability and, hence, have
3、enough liquidity. Three biomass energy resource in China, industry growth prospects are very experienced and bright prospects for development of biomass power generation industry. On one hand, the sown area of 1.8 billion mu of crops, the year produces 700 million tons of matter. Apart from the part
4、s used in papermaking and livestock feed, and the rest will be done fuel use. The other hand, Chinas current forest area of about 175 million hectares, the forest coverage rate of 18.21%, every year through normal Bush stumping rejuvenation, forest thinning, hedgerow fruit trees and the collection o
5、f forest felling, bucking, processing residues, biomass resources available at about 800 million to 1 billion tons. Theory of biomass energy resource in China close to 1.5 billion tons of standard coal. By 2020, the biomass energy development and utilization of capacity of 500 million tons of standa
6、rd coal, equivalent to more than 15% supplies. And extremely low sulphur content of the biomass 0.3%, 1/4 not to the sulphur content of the coal. Development of biomass solid fuels, implement coal alternatives, significantly reduces the carbon dioxide and sulfur dioxide emissions, have a significant
7、 environmental benefit. Second section industry investment opportunities for promoted health material energy of steadily development, September 2006, Treasury, and national development and Reform Committee, and Ministry of agriculture, and national tax General, and national forestry Council joint in
8、troduced has on development biological quality energy and biological chemical tax support policy of implementation views, in risk avoid and compensation, and raw materials base grants, and model grants, and tax relief, aspects for development biological quality energy and biological chemical develop
9、ed has specific of tax support policy. In addition, since the renewable energy law came into effect on January 1, 2006, making a complete set of administrative rules and regulations also promulgated. On October 4, 2006 of the Ministry of the interim measures for the administration of special funds f
10、or renewable energy development, the approach of special funds to support key, application and approval, financial management, checking and supervision of comprehensive provisions. The regulations: development of special funds established by the financial departments of the State Council, the use of
11、 special funds for the development include free grants and subsidized loans, through the central financial budget. According to the role of biomass energy and the countrys status quo, is currently focused on the development of the project are as follows: (1) recent development priorities: biomass ga
12、sification and gas, biomass gasification power generation, large biogas, biomass direct combustion heating (2) medium-and long-term development projects: height of biomass gasification power generation project (BIG/CC), the production of hydrogen from biomass such as resource in China close to 1.5 b
13、illion tons of standard coal. By 2020, the biomass energy development and utilization of capacity of 500 million tons of standard coal, equivalent to more than 15% supplies. And extremely low sulphur content of the biomass 0.3%, 1/4 not to the sulphur content of the coal. Development of biomass soli
14、d fuels, implement coal alternatives, significantly reduces the carbon dioxide and sulfur dioxide emissions, have a significant environmental benefit. Second section industry investment opportunities for promoted health material energy of steadily development, September 2006, Treasury, and national
15、development and Reform Committee, and Ministry of agriculture, and national tax General, and national forestry Council joint introduced has on development biological quality energy and biological chemical tax support policy of implementation views, in risk avoid and compensation, and raw materials b
16、ase grants, and model grants, and tax relief, aspects for development biological quality energy and biological chemical developed has specific of tax support policy. In addition, since theAdded. Finally, foreign investment risk, there are also opportunities. Financial crisis caused the stock and cor
17、porate bond prices plummeted, early Chinese banks foreign exchange assets in the foreign exchange reserves investment and losses, but at present the international prices of many financial assets in a low, to promote foreign mergers and acquisitions in China and promoting enterprise “going out“ diver
18、sified cooperation, actively explore overseas resources and markets and opportunities. Meanwhile, in response to the adverse impact of world economic crisis on China, the State Council announced 10 measures to expand domestic demand and promote growth over the next two years the implementation of th
19、ese measures will take about 4 trillion yuan central budget support. The 4 trillion yuan investment has an inkling, transportation, forestry, water conservancy, peoples livelihood, environmental protection and other areas will be skewed. Increased investment will play a significant role in promoting
20、 Chinas economic growth, at the same time, there should be other pro-growth measures rolled out. A series of positive measures by the State and function of 4 trillion the Central Treasury, our economy will be sustained, stable and rapid development gradually. Section II market analysis of technical
21、feasibility of biomass fuel shaping technology and equipment is the core of industrialization of biomass briquette fuel. Biomass briquetting technology refers to a certain temperature and under pressure, will be scattered and various shapes of biomass raw materials into high density, with a variety
22、of fuels technology. Biomass briquetting equipment including screw-extrusion molding machines, mechanical piston stamping forming machine, ring die-roll and hydraulic piston stamping molding machines. Mechanical piston forming and hydraulic piston forming machine total up production efficiency low e
23、nergy high, former of productivity low, actual productivity in 100-200 kg, main work parts life low not for industrialization production; which main work parts life long, but highest production capacity lower energy high; from technology index view, ring die roll pressure type forming machine produc
24、tion rate highest, energy low, products cost low, while technology content also high, for Yu scale production promotion. Since in the 1980 of the 20th century, Chinas bio-technology research and development have made great progress, national research and production equipment of enterprises or resear
25、ch institutes has dozens of homes. Chinas industrialization of biomass briquette fuel prototype is formed, however, to be mature and realize industrialization, you first need to overcome some constraints, some technical obstacles. Includes the main working parts of the short working life, poor abili
26、ty to coordinate equipment systems, running unstable, and so on. Also, due to the lack of effective industrial practices, solid biomass industry is still in its infancy in China. Biomass fuel shaping technology, stable performance and low power consumption of the device is the core of industrializat
27、ion of biomass fuel, good industry and the Governments support and the necessary funding is a prerequisite for industrialization of biomass briquette fuel. To compress biomass briquette processing cost, you will need to yield power, vulnerable performance and low cost, labor cost, control three aspe
28、cts. Meanwhile, burning of biomass is also on the industrys core technology, generally, because of biomass fuels to replace coal, can be used, in fact, due to biomass目 录毕业论文（设计）任务书 .- 1 -开题报告 .- 1 -摘 要 .- 3 -关键词 .- 4 -引 言 .1第一章 水塔水位系统方案 .21.1 系统方案论证 .21.2 水塔水位自动控制系统 .21.3 水塔水位发展与应用 .3第二章 电路设计 .42.1
29、电路原理 .42.2 系统原理框图 .42.3 水泵电机主控图 .52.4 电路的组成 .52.5 工作原理 .62.6 元件清单 .7第三章 水塔水位自动控制电路的结构 .83.1 控制原理 .83.2 系统结构 .8结 论 .9参考文献 .10附 录 .11致 谢 .12开题报告一、研究的目的水塔水位控制系统是我国住宅小区广泛应用的供水系统,传统的控制方式存在控制精度低、能耗大的缺点,而自动控制原理, 依据用水量的变化自动调节系统的运行参数,保持水压恒定以满足用水要求, 从而提高了供水系统的质量。而且成本低，安装方便，经过多次实验证明，灵敏性好，是节约水源，方便家庭和单位控制水塔水位的理想
30、装置。水塔水位控制系统采用交流电压检测水位，水位低于下限 B 点水位时，水泵抽水，水位达到最高水位线 A 时，水泵停止抽水，水位降低到最低水位线B 以下时，恢复运行抽水。从而实现自动控制。二、研究的意义不论社会经济如何飞速，水在人们正常生活和生产中起着重要的作用。一旦断了水，轻则给人民生活带来极大的不便，重则可能造成严重的生产事故及损失，从而对供水系统提出了更高的要求，满足及时、准确、安全充足的供水。如果仍然使用人工方式，劳动强度大，工作效率低，安全性难以保障，由此必须进行自动化控制系统的改造。从而实现提供足够的水量、平稳的水压、水塔水位的自动控制有设计低成本、高实用价值的控制器。该设计采用分
31、立的电路实现超高、低警戒水位处理,实现自动控制,而达到节能的目的,提高了供水系统的质量。三、主要内容及要求水塔水位自动控制器，包括接于电源的继电器、三极管以及一端设于水塔内的导线，在所述电源的一端接于三极管的 e 极，而 b 极由导线接于水塔的近低部，三极管的 c 极串经继电器的线圈与电源的另一端相接；同时，设于水塔高水位的导线的另一端也并接于 c 极，而设于水塔低水位的导线的另一端串经继电器 J 的常开触头也并接于 c 极；继电器 J 的常闭触头串接在水泵的控制回路上。检测电路有电阻串联探针，探针下端为低水位控制点，电阻上面为高水位控制点，控制电路两分压电阻串联的连接点经电阻连接控制集成块，
32、控制集成块的输出脚连接三极管的基极，三极管连接继电器，检测电路的电阻连接两分压电阻的连接点。具有结构简单，使用寿命长，可靠性高，操作维修方便，经济实用的优点。Annual straw consumption is about 300 (15x20) million tons to 450 (15x30) million tonnes. Around each plant to town for curing Center straw briquette factory, about 30, curing each straw briquette factory production capac
33、ity of 10,000 tons per year, production of major products supply power plants and the rest as ordinary fuel. Chapter III, section I industry investment analysis investment benefit analysis, industry profitability industry benchmark yield to 12%, more than a moderate level of profitability, have high
34、er profitability. Secondly, solvency, with good profitability and, hence, have enough liquidity. Three biomass energy resource in China, industry growth prospects are very experienced and bright prospects for development of biomass power generation industry. On one hand, the sown area of 1.8 billion
35、 mu of crops, the year produces 700 million tons of matter. Apart from the parts used in papermaking and livestock feed, and the rest will be done fuel use. The other hand, Chinas current forest area of about 175 million hectares, the forest coverage rate of 18.21%, every year through normal Bush st
36、umping rejuvenation, forest thinning, hedgerow fruit trees and the collection of forest felling, bucking, processing residues, biomass resources available at about 800 million to 1 billion tons. Theory of biomass energy resource in China close to 1.5 billion tons of standard coal. By 2020, the bioma
37、ss energy development and utilization of capacity of 500 million tons of standard coal, equivalent to more than 15% supplies. And extremely low sulphur content of the biomass 0.3%, 1/4 not to the sulphur content of the coal. Development of biomass solid fuels, implement coal alternatives, significan
38、tly reduces the carbon dioxide and sulfur dioxide emissions, have a significant environmental benefit. Second section industry investment opportunities for promoted health material energy of steadily development, September 2006, Treasury, and national development and Reform Committee, and Ministry o
39、f agriculture, and national tax General, and national forestry Council joint introduced has on development biological quality energy and biological chemical tax support policy of implementation views, in risk avoid and compensation, and raw materials base grants, and model grants, and tax relief, as
40、pects for development biological quality energy and biological chemical developed has specific of tax support policy. In addition, since the renewable energy law came into effect on January 1, 2006, making a complete set of administrative rules and regulations also promulgated. On October 4, 2006 of
41、 the Ministry of the interim measures for the administration of special funds for renewable energy development, the approach of special funds to support key, application and approval, financial management, checking and supervision of comprehensive provisions. The regulations: development of special
42、funds established by the financial departments of the State Council, the use of special funds for the development include free grants and subsidized loans, through the central financial budget. According to the role of biomass energy and the countrys status quo, is currently focused on the development of th
