Introduces a design of intelligent release which is used TCP /IP communication protocol. In this paper, dsPIC as the core processor and showing the overall hardware design scheme of intelligent release. It can achieve signal acquisition, signal processing and protect power in the grid. And using Ethernet controller ENC28J60 and TCP / IP protocol stack to achieve the communication of intelligent release.
Abstract:The low concentration of hydrochloric acid produced during the separation process of rare earth no saponification extraction is best available for recycling. The adsorption and desorption characteristics of N235 resin on dilute HCl solution were investigated by static adsorption method and dynamic adsorption method. The adsorption equilibrium constant, the saturated adsorption capacity of resin and its relationship with the initial HCl concentration were obtained by static adsorption experiment. The results of dynamic adsorption showed that the adsorption flow rate, the resin column height, the HCl concentration, the chloride concentration in the solution, the downstream flow/countercurrent mode would affect the resin equilibrium adsorption capacity; Besides, the maximum concentration of HCl solution obtained by the adsorption and desorption of N235 resin on dilute HCl solution is equal to the initial concentration of adsorbate, and has obvious "memory effect",and with the method of alkali absorption can reach the enrichment of hydrochloric acid at extreme dilute solution.
The paper studied land degradation tendency in the middle part of the North Agro-Pastoral Zigzag Zone. Depending mainly on 1990 and 2002 TM images, and with other data such as soil, DEM etc., the results show that: about 45.8% of the land in the studied area has a problem of degradation. The most important type of land degradation problem is sandy desertification and water erosion is the second. And the limited salinization soils mainly centralized around drying lakes and limited irrigating farming lands. And yet the degradation level decrease from northwestern to the Southeastern of the studied area, with the degradation type changes from sandy desertification to water erosion.
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