锦州热电总公司调峰锅炉房汽机配套改造工程设计

本文介绍了一个利用原有供热35t/h中压中温蒸汽锅炉进行发电的工程设计实例,实现了充分利用废弃的高位能量,取得良好的节能效果。对如何利用工厂系统中的废弃能源有一定参考价值。

Micro Structural Development of in Situ Heated and Deformed Pure and Silica Gel-Doped Polycrystalline Halite Using High Energy Synchrotron Radiation

This paper presents an experimental investigation of the microstructural development upon in situ compression and heating of pure and SiO2 gel-doped （5 wt%） polycrystalline halite, with grain sizes ranging from 45 μm to 〉70 μm （cold pressed at 200 MPa and heated at 150 ℃ for one week）, using high energy synchrotron x-ray radiation. Texture development of the samples was studied at room temperature, 100, 200 and 300 ℃. At each temperature, the samples were axially compressed keeping the load constant at every -500 N step up to the maximum 2,400 N （- 48 MPa）. At the different loads and temperatures, 2D images and load/elongation curves were recorded in situ to get information about the texture development and the rheological behaviour of the potycrystalline halite samples. At high stresses, the doped halite samples show an increase in the elastic moduli and in the microstrain The results were confirmed by the single grain orientation analyses using the FABLE program, where a sharpening of the texture was observed.

Unusual combined fracture dislocation of the wrist and metacarpophalangeal joints： a case report and review of the literature

Volar perilunate fracture dislocation is an extremely rare carpal injury, but associated with metacarpophalangeal joint dislocation of both the ipsilateral index and middle finger has never been reported. We report one case of a 28-year-old man following a high-energy trauma. After performing closed reduction of the metacarpophalangeal joint injury, open reduction of the wrist injury through volar approach was done, and a K-wire fixation was used to stabilize the scaphoid fracture and lunotriquetral joint. After a 16 months＇ follow-up period, the wrist regained a full range of motion without symptoms, and the fractured bone was strengthened in a good position.

Self-assembled energetic coordination polymers based on multidentate pentazole cyclo-N_5^-

Coordination to form polymer is emerging as a new technology for modifying or enhancing the properties of the existed energetic substances in energetic materials area. In this work, guanidine cation CN3 H6+ (Gu) and 3-amino-1,2,4-triazole C2H4N4(ATz) were crystallized into NaN5 and two novel energetic coordination polymers(CPs),(NaN5)5[(CH6-N3)N5](N5)3–(1) and(NaN5)2(C2H4N4)(2) were prepared respectively via a self-assembly process. The crystal structure reveals the co-existence of the chelating pentazole anion and organic component in the solid state. In polymer 1, Na+and N5– were coordinated to form a cage structure in which guanidine cation [C(NH2)3]+ was trapped;for polymer 2, a mixedligand system was observed;N5 – and ATz coordinate separately with Na+and form two independent but interweaved nets. In this way, coordination polymer has been successfully utilized to modify specific properties of energetic materials through crystallization. Benefiting from the coordination and weak interactions, the decomposition temperatures of both polymers increase from 111°C(1D structure [Na(H2 O)(N5)]?2 H2 O) to 118.4 and 126.5°C respectively. Moreover, no crystallized H2 O was generated in products to afford the anhydrous compounds of pentazole salts with high heats of formation( >800 kJ mol–1). Compared to traditional energetic materials, the advantage in heats of formation is still obvious for the cyclo-N5– based CPs, which highlights cyclo-N5– as a promising energetic precursor for high energy density materials(HEDMs).

Engineering oxygen vacancy on rutile TiO_2 for efficient electron-hole separation and high solar-driven photocatalytic hydrogen evolution

Oxygen vacancy（VO） plays a vital role in semiconductor photocatalysis. Rutile TiO2 nanomaterials with controllable contents of VO（0–2.18%） are fabricated via an insitu solid-state chemical reduction strategy, with color from white to black. The bandgap of the resultant rutile TiO2 is reduced from 3.0 to 2.56 e V, indicating the enhanced visible light absorption. The resultant rutile TiO2 with optimal contents of VO（2.07%） exhibits a high solar-driven photocatalytic hydrogen production rate of 734 μmol h-1, which is about four times as high as that of the pristine one（185 μmol h-1）. The presence of VOelevates the apparent Fermi level of rutile TiO2 and promotes the efficient electronhole separation obviously, which favor the escape of photogenerated electrons and prolong the life-time（7.6×103 ns） of photogenerated charge carriers, confirmed by scanning Kelvin probe microscopy, surface photovoltage spectroscopy and transient-state fluorescence. VO-mediated efficient photogenerated electron-hole separation strategy may provide new insight for fabricating other high-performance semiconductor oxide photocatalysts.