Steam turbine itself is the most widely used prime mover in thermal power plants. Compared with other equipment, steam turbine has the characteristics of stronger power, longer service life and higher efficiency. At p...Steam turbine itself is the most widely used prime mover in thermal power plants. Compared with other equipment, steam turbine has the characteristics of stronger power, longer service life and higher efficiency. At present, with the rapid development of science and technology in our country, the heat exchange equipment of steam turbine has also been developed rapidly at this stage. However, due to its complicated technology and significantly stronger functionality, this paper mainly analyzes and studies the actual conditions of deaerator and condenser, analyzes the effect of demineralized water temperature on dissolved oxygen, conducts the heating of demineralized water direct-makeup condenser and slag cooler, and puts forward the specific scheme to prevent the increase of dissolved oxygen in steam turbine and the measures and effects of rational use of heat energy, hoping to improve the safe operation efficiency and speed of the unit.展开更多
Western grassland is the main source of living and means of production of western inhabitants. For many years, desertification and poisonous-weeds growth in grassland were resulted from over-grazing, over-reclaiming, ...Western grassland is the main source of living and means of production of western inhabitants. For many years, desertification and poisonous-weeds growth in grassland were resulted from over-grazing, over-reclaiming, over-spading and population growth. Western natural ecological environment is destroyed severly. Meanwhile, it has restricted the sustainable development of animal husbandry. The fast spreading poisonous-weeds, which caused grassland ecology unbalance, is one of the considerable bioecology problems and an important index of grassland degeneration. Based on analysis and induction of previous data, this article introduced the situation of poisonous-weeds disaster of western grassland in recent decades, category and distribution of poisonous-weeds, integrated control and reasonable utilization.展开更多
The 1997 United Nations Convention on the Law of the Non-navigational Uses of International Watercourses (UNWC) contains a negotiation framework for transboundary water rights. However, it is a subjective document ope...The 1997 United Nations Convention on the Law of the Non-navigational Uses of International Watercourses (UNWC) contains a negotiation framework for transboundary water rights. However, it is a subjective document open to a wide range of possibilities and interpretations. Water Rights Allocations (WRAs) as described by Dinar and Nigatu (2013) and Dinar and Tsur (2017) provide a limited number of quantifiable allocation possibilities based on the UNWC. It is suggested that this methodology streamlines the negotiation process and reduces the effects of hydro hegemony. These methodologies are explored and applied through a case study on the Orontes River Basin.展开更多
文摘Steam turbine itself is the most widely used prime mover in thermal power plants. Compared with other equipment, steam turbine has the characteristics of stronger power, longer service life and higher efficiency. At present, with the rapid development of science and technology in our country, the heat exchange equipment of steam turbine has also been developed rapidly at this stage. However, due to its complicated technology and significantly stronger functionality, this paper mainly analyzes and studies the actual conditions of deaerator and condenser, analyzes the effect of demineralized water temperature on dissolved oxygen, conducts the heating of demineralized water direct-makeup condenser and slag cooler, and puts forward the specific scheme to prevent the increase of dissolved oxygen in steam turbine and the measures and effects of rational use of heat energy, hoping to improve the safe operation efficiency and speed of the unit.
基金funded by National Nature Science Foundation of China(31072175)Tibet Project Supported by Ministry of Agriculture of the People's Republic of China(20071010)
文摘Western grassland is the main source of living and means of production of western inhabitants. For many years, desertification and poisonous-weeds growth in grassland were resulted from over-grazing, over-reclaiming, over-spading and population growth. Western natural ecological environment is destroyed severly. Meanwhile, it has restricted the sustainable development of animal husbandry. The fast spreading poisonous-weeds, which caused grassland ecology unbalance, is one of the considerable bioecology problems and an important index of grassland degeneration. Based on analysis and induction of previous data, this article introduced the situation of poisonous-weeds disaster of western grassland in recent decades, category and distribution of poisonous-weeds, integrated control and reasonable utilization.
文摘The 1997 United Nations Convention on the Law of the Non-navigational Uses of International Watercourses (UNWC) contains a negotiation framework for transboundary water rights. However, it is a subjective document open to a wide range of possibilities and interpretations. Water Rights Allocations (WRAs) as described by Dinar and Nigatu (2013) and Dinar and Tsur (2017) provide a limited number of quantifiable allocation possibilities based on the UNWC. It is suggested that this methodology streamlines the negotiation process and reduces the effects of hydro hegemony. These methodologies are explored and applied through a case study on the Orontes River Basin.
