Shandong Chemical Planning and Design Institute

Jinan, China

Shandong Chemical Planning and Design Institute

Jinan, China
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Tang W.-Q.,Shandong Chemical Planning and Design Institute | Miao X.-W.,Shandong Chemical Planning and Design Institute
Huaxue Gongcheng/Chemical Engineering (China) | Year: 2010

The correlation calculation for the oxidation velocity of NO to NO2 was proposed under the condition of alkaline medium. By considering the oxidation velocity of NO to NO2, the correlation of oxidation velocity was deduced by means of differential and integral calculation of oxidation velocity formula of NO, combining the reaction equations for NO oxidation and reaction of NO, NO2 with alkali to produce nitrate. By the engineering calculation and verification, the correlation is applicable to industry.


Qu S.-L.,Shandong Chemical Planning and Design Institute | Zhang Y.,Shandong Chemical Planning and Design Institute | Zhu Y.-Y.,Shandong Chemical Planning and Design Institute
Huaxue Gongcheng/Chemical Engineering (China) | Year: 2010

The status of fresh water-saving in coal to methanol and related corporation in China was studied and analyzed. Nowadays the main methods of water-saving is focused on repeat usage of industrial water (including circulating water and process condensate recovery), the improvement of technical equipment (dry dedusting system, steam dissociation rate enhancement and so on), the technology of wastewater treatment (stepwise utilization of wastewater, increase of circulating water condensive multiple), equipment leak-proof technology and rapid blocking repair technology. However, there is a great potential of saving fresh water compared with other countries. So technical and engineering innovations and feasible measurements are needed to advance the fresh water-saving process.


Zheng S.-Q.,Qingdao University of Science and Technology | Yao Y.,Shandong Chemical Planning and Design Institute | Guo F.-F.,Shandong Chemical Planning and Design Institute | Bi R.-S.,Qingdao University of Science and Technology | Li J.-Y.,Shandong Chemical Planning and Design Institute
Chemical Engineering Science | Year: 2010

Particle image velocimetry (PIV) was used to measure local bubble size distributions (BSD), gas-liquid interfacial areas and gas holdups in an up-flow ejector, based on the water-air system with different liquid and gas flow rates under the presence/absence of the swirl body. The results show that the bubble flow patterns are different whether to add the swirl body into the nozzle, especially at low gas flow rate because the bubbles formed "bubble chain" in the ejector with swirl. The mean bubble sizes D32 of the two are both related to the pressure drop between import and export, gas ratio and liquid flow. The interfacial area and D32 are both mainly dependent on the local gas holdups. The mean bubble sizes in the absence of swirl body are smaller than that in the presence of swirl under different operating conditions. The gas holdups and interfacial area are larger with swirl than those without swirl. With the increase of the gas fraction, the differences of D32, at and eG become smaller. © 2010 Elsevier Ltd.


Liu P.,Central South University | Yu Z.-W.,Central South University | Huang X.-H.,Central South University | Zhang X.-Q.,Shandong Chemical Planning and Design Institute
Xi'an Jianzhu Keji Daxue Xuebao/Journal of Xi'an University of Architecture and Technology | Year: 2010

The properties of air previous and sorptivity of the phosphoaluminate cement (PAC) concrete were investigated, and the mechanism was discussed as well. The phase composition and morphology of hydration products and electrical properties of PAC cured 28 days were analyzed with x-ray diffraction (XRD) and electrochemical impedance spectroscopy (EIS). It is indicated that the properties of PAC concrete are better than PC. The corresponding index of air previous and sorptivity of PAC cured 28 days is 1.37×10 -2 Ln(P)/min, 4.56×10 -9 m 3/min 0.5, because the hydration mechanism and the hydrates of PAC are different from PC and the hydration mechanism and the hydrates of PAC are different from PC. The hydration products of PAC are main micro-crystalline phase and gel of phosphate and phophoaluminate which form a compact microstructure. What's more, there is no calcium hydroxide produced during the process of hydration. The permeability coefficient of PAC concrete will be reduced with age, due to more hydration products continuously formed.

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