Lanpec Technologies Limited

Lanzhou, China

Lanpec Technologies Limited

Lanzhou, China
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Through finite element calculation to the different height to width aspect ratio of rectangular atmospheric vessel wall plate, the results showed that the highest stress area transfers from the bottom to both sides of wall plate and the stress of the wall plate top became smaller and became the lowest stress area with the height to width aspect ratio increasing. The saddle area of higher stress gradually extended to the bottom and sides of wall plate with the height to width aspect ratio increasing. Because higher stress area moves down on wall plate with the height to width aspect ratio increasing, reinforcing ribs of the wall plate upper middle can be reduced.


Su M.,Lanpec Technologies Limited
Petrochemical Equipment | Year: 2012

A brief introduction was presented for the structure and installation and operation of plate heat exchanger. Aiming at the existing fault, the measures were put forward.


Sang G.-P.,Lanpec Technologies Limited
Petrochemical Equipment | Year: 2012

The analysis was made for SA-516 high strength steel on its chemical composition and mechanical property. The presentation was made for weld preparation, control in welding process, post-weld temperature holding time, and NOT during winter period. The equipment in such process meets the requirement and quality.


Zhang P.-Y.,Lanpec Technologies Limited
Petrochemical Equipment | Year: 2012

The structure and distribute hole mode and main structural parameters of fluid distributor for large scale falling film evaporator are introduced, and the affect of distributor employment is analyzed.


Zhang S.-W.,Lanpec Technologies Limited
Petrochemical Equipment | Year: 2012

The configuration, working principle, study of liquefied natural gas composition and physical properties, design of star-finned high efficiency heat transferring tubes, heat transferring analysis and calculation are shown, that can be referenced by design and production in practice.


Ma Y.-L.,Lanpec Technologies Limited
Petrochemical Equipment | Year: 2014

Using potentiodynamic polarization, AC impedance and capacitance measurement methods to study the electrochemical behavior and generate passive film semiconductor properties of 316L stainless steel in different concentrations of NaCl, NaS · 9H2O; solution The results show that: as the increasing of NaCl concentration, stainless steel pitting, potential and pitting solution resistance decreased rapidly, pitting resistance decreased. It is difficult for 316L stainless steel to generate semiconductor passivation film with the increasing of NaCl concentration, the structure of passivation film converted from model n, model p into model p, the impurities of the passivation film increased, and the resistance to pitting corrosion decreased; With the increasing of NaS · 9H2O; concentration, 316L stainless steel pitting potential and pitting hole solution resistance decreased rapidly, pitting resistance decreased;in different concentrations of NaS · 9H2O; solution, 316L stainless steel passivation film generated semiconductor model n and model p, the passivation film impurity increased as the increasing of NaS · 9H2O; concentration, resistance to pitting corrosion decreased.


Xu L.,Tianjin University | Xu L.,Tianjin Key Laboratory of Membrane Science and Desalination Technology | Guo Z.,Tianjin University | Guo Z.,Tianjin Key Laboratory of Membrane Science and Desalination Technology | And 2 more authors.
Electrochimica Acta | Year: 2013

This work is conducted to study ability of anodic oxidation treatment azo dye C.I. Acid Red 73 (AR73) using the electrodes of Y doped Ti/SnO 2-Sb electrodes prepared by thermal decomposition and Ti/SnO 2-Sb electrodes prepared by electrodeposition. It has been shown that doping Y can enhances the electrochemical activity of the electrodes, but the accelerated service life was slightly reduced. Both the lifetime and electrochemical activity of Ti/SnO2-Sb electrodes prepared by electrodeposition in a new Sn-Sb electrodeposition bath outperform the Ti/SnO2-Sb electrodes prepared by thermal decomposition. Moreover, the effect of varying wastewater process indexes (initial pH (4-10), the addition of NaCl (0-9 mM) and initial dye concentration (0.5-2.0 g L -1)) on the performance of anodic oxidation using Ti/SnO 2-Sb electrodes prepared by electrodeposition was investigated followed by the performance indicators analyses including color, chemical oxygen demand (COD), current efficiency and specific energy consumption. Finally, the synergy technology of anodic oxidation coupling nanofiltration was adopted to treat AR73 wastewater in order to overcome the low current efficiency of anodic oxidation. Preliminary results have shown that the synergy technology could cost-effectively treat AR73 wastewater. © 2013 Elsevier Ltd.


Zhou J.-X.,Lanpec Technologies Limited
Petrochemical Equipment | Year: 2013

Based on force analysis of integral flange, detailed analysis and design method were introduced for heat exchanger channel flange and shell flange. The calculation example for channel flange and shell flange was presented.


Zhou C.,East China University of Science and Technology | Lu X.,East China University of Science and Technology | Xin Z.,East China University of Science and Technology | Liu J.,East China University of Science and Technology | Zhang Y.,Lanpec Technologies Limited
Progress in Organic Coatings | Year: 2013

A hydrophobic benzoxazine-cured epoxy coating (EPB) was prepared by a dip coating and thermal curing method using benzoxazine monomer (B-TMOS) as curing agent. Fourier transform infrared (FTIR) analyses confirmed the presence of thermal curing reactions and hydrogen-bonding interactions in the epoxy/polybenzoxazine system. The hydrophobicity of epoxy coatings induced by the incorporation of B-TMOS was enhanced significantly, and the water contact angles of resultant EPB coatings were higher than 98. The corrosion protection ability of epoxy coatings was investigated by open-circuit potentials, potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS) methods. The results showed that the charge transfer resistance (R ct) of EPB coatings was increased by about three orders of magnitude compared with bare mild steel, and the protection efficiency values of all EPB samples were more than 98%. This increased corrosion protection property could be attributed to the high hydrophobic performance of EPB coatings. © 2013 Elsevier B.V. All rights reserved.


Zhou C.,East China University of Science and Technology | Lu X.,East China University of Science and Technology | Xin Z.,East China University of Science and Technology | Liu J.,East China University of Science and Technology | Zhang Y.,Lanpec Technologies Limited
Corrosion Science | Year: 2014

A series of nanocomposite coatings (PBS) consisting of silane functional polybenzoxazine (PB-TMOS) and SiO2 nanoparticles were developed for corrosion protection of mild steel. The influence of silica content on corrosion resistance of PBS coatings was investigated by electrochemical measurements. The surface chemistry of nanoparticles and its effect on morphology of the PBS coating was also studied utilizing Fourier Transforms Infrared Spectroscopy, 29Si Nuclear Magnetic Resonance and Scanning Electron Microscopy analyses. The results indicate that the presence of the covalent bond between nanoparticles and PB-TMOS, greatly improves the interfacial interactions at the polymer/filler interfaces resulting in a better corrosion performance. © 2013 Elsevier Ltd.

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