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Wang H.,Hualu Engineering & Technology Co. | Lei N.,Xi'an International University | Deng Y.,Southwest University of Science and Technology | Wang R.,Southwest University of Science and Technology
World Information on Earthquake Engineering | Year: 2015

Based on the good mechanical properties of H section steel, a kind of multilayer cold-formed thin-walled steel structure with H-type layout was designed. Elastoplastic seismic response time history calculation of the structure under different working conditions was carried out, and the displacement response, drift of story and the acceleration of top floor of the structure were analyzed. The results show that: (1)the drift angle of the structure meet the code requirements under six seismic intensities, the maximum displacement of the top floor in X-direction is 9.213mm, that in Y-direction is 5.432mm, i. e. smaller. (2) the acceleration response of the top floor is bigger than 10000mm/s2 under high intensity earthquake, and the structure shakes badly, but it is still in a safe state without the plastic deformation; comprehensive analysis results persent that, the multilayer cold-formed thin-walled steel structure with H layout has good seismic resistance capasity, and it is suggested to consider the use of this kind of plane layout for engineering. ©, 2015, Science and Technology Periodical Press. All right reserved.


Hu H.,Fuzhou University | Jiang B.,Fuzhou University | Wu H.,Hualu Engineering & Technology Co. | Zhang J.,Fuzhou University | Chen X.,Fuzhou University
Journal of Environmental Radioactivity | Year: 2016

In this work, a biochar was prepared from bamboo (Acidosasa edulis) shoot shell through slow pyrolysis (under 300–700 °C). Characterization with various tools showed that the biochar surface was highly hydrophobic and also had more basic functional groups. Batch sorption experiments showed that the biochar had strong sorption ability to perrhenate (a chemical surrogate for pertechnetate) with maximum sorption capacity of 46.46 mg/g, which was significantly higher than commercial coconut shell activated carbon and some adsorbents reported previously. Desorption experiments showed that more than 94% of total perrhenate adsorbed could be recovered using 0.1 mol/L KOH as a desorption medium. Pearson correlation analysis showed that the recovery of perrhenate by the biochars was mainly through surface adsorption mechanisms involving both high hydrophobicity and high basic sites of biochar surface. © 2016 Elsevier Ltd


Huang L.,Hualu Engineering & Technology Co. | Zhang X.,Hualu Engineering & Technology Co. | Jiang K.,Hualu Engineering & Technology Co. | Liu D.,Henan Junhua Development Co.
Huaxue Gongcheng/Chemical Engineering (China) | Year: 2014

Coal gasification process produces NH3 and CO2, which forms NH3-CO2-H2O ternary system with water in the gas washing, gray water treatment, shift and heat recovery section. An accurate ternary system phase equilibrium model can predict NH3 distribution in gasification and solve the problem of crystallization of ammonium salt and excessive ammonia in waste water. It is proposed that the ionization and acid-based reactions between NH3 and CO2 in aqueous solution cause the bias of experimental data and Aspen electrolyte NRTL model predicted value. The binary interaction parameters of electrolyte NRTL model and Henry's coefficient were regressed by using vapor-liquid equilibrium experimental data of NH3-CO2-H2O ternary system. The modified electrolyte NRTL model was established. The average relative error between modified model calculated result and experimental data is less than 2.9%. The modified model can accurately predict NH3-CO2-H2O ternary system vapor-liquid equilibrium of coal gasification equipment operated in low pressure, which has great importance in engineering design and plant operation. ©, 2014, Editorial Office of Chemical Engineering (China). All right reserved.


PubMed | Hualu Engineering & Technology Co. and Fuzhou University
Type: | Journal: Journal of environmental radioactivity | Year: 2016

In this work, a biochar was prepared from bamboo (Acidosasa edulis) shoot shell through slow pyrolysis (under 300-700C). Characterization with various tools showed that the biochar surface was highly hydrophobic and also had more basic functional groups. Batch sorption experiments showed that the biochar had strong sorption ability to perrhenate (a chemical surrogate for pertechnetate) with maximum sorption capacity of 46.46mg/g, which was significantly higher than commercial coconut shell activated carbon and some adsorbents reported previously. Desorption experiments showed that more than 94% of total perrhenate adsorbed could be recovered using 0.1mol/L KOH as a desorption medium. Pearson correlation analysis showed that the recovery of perrhenate by the biochars was mainly through surface adsorption mechanisms involving both high hydrophobicity and high basic sites of biochar surface.


Gao J.,Hualu Engineering & Technology Co. | Shang J.,Hualu Engineering & Technology Co. | Wang Y.-G.,Hualu Engineering & Technology Co. | Zhang Z.-M.,Hualu Engineering & Technology Co. | And 2 more authors.
Huaxue Gongcheng/Chemical Engineering (China) | Year: 2015

Based on the analysis of tube-shell heat-exchanger, the entire equations group of heat transfer was created, so as to calculate the heat loss and each wall temperature of tube shell and heat preservation layer, etc. It presents the part analytic solution and entire way of calculation. The convergence of algorithm is of stability, and this algorithm can provide an entire heat-loss solution for heat-exchanger thermodynamic calculation and engineering design, which is already applied in the domestic software. At last, an example of its application (manual iterative computation) was given. © 2015, Editorial Office of "CHEMICAL ENGINEERING" (China). All right reserved.


Li W.,Beijing University of Chemical Technology | Gao J.,Hualu Engineering & Technology Co. | Zhang J.-J.,Beijing University of Chemical Technology | Cai Z.-Q.,Beijing University of Chemical Technology
Huaxue Gongcheng/Chemical Engineering (China) | Year: 2015

The power and mixing efficiency of four types of impeller combination, including double helix and Paravisc as the main impeller, and anchor and variable-diameter double helix as the bottom impeller, were studied by CFD. And the scale-up of the optimal combined impeller was explored. The correlations of power number of the mentioned impellers were obtained and the power reaction relationship between two impellers was also proposed. Among the tested ten combinations, the Paravisc-anchor requires the least rotations to reach a full mixing, and has the larger dimensionless shear strain at the same rotational speed, showing the best mixing performance. In the scale-up of the tank with Paravisc-anchor from 100 L to 200 L and 500 L, it is found that the scale-up follows the tip linear velocity principle. The study provides important reference for the industrial design and optimization of combined impeller parameters of high viscosity fluid. © 2015, Editorial Office of Chemical Engineering (China). All right reserved.


Patent
Xuzhou Southeast Polysilicon R&D LTD and Hualu Engineering & Technology Co. | Date: 2010-04-28

The present invention relates to an improved process and apparatus for the preparation of trichlorosilane and polycrystalline silicon. During the preparation of polycrystalline silicon, trichlorosilane is prepared by hydrochlorination, comprising a) heating metallurgical silicon to a temperature of 300-500 C in a powder drying furnace followed by putting it into a reactor; b) gasifying and heating silicon tetrachloride with an external heater to form silicon tetrachloride gas of a temperature of 160-600 C; c) preheating hydrogen chloride gas to a temperature of 150-300 C with the external heater; d) preheating hydrogen gas to a temperature of 300-600 C with a heater; and e) introducing gases from steps b), c) and d) into the reactor with a hydrogen to silicon tetrachloride molar ratio of about 1: 1 to 5: 1 and a hydrogen chloride to silicon tetrachloride molar ratio of about 1: 1 to 1: 20, the reactor being kept at a temperature of about 400-600 C and under a pressure of about 1.0-3.0 MPa. The process of the present invention can cost-effectively prepare polycrystalline silicon suitable for use in semiconductor industry and solar cells.


Cui C.,Hua Lu Engineering Technology Co. | Wang K.-W.,Hua Lu Engineering Technology Co. | Zhang X.-P.,Hua Lu Engineering Technology Co.
Xiandai Huagong/Modern Chemical Industry | Year: 2010

The internal and external conditions for developing port petrochemical industry in Shantou are introduced. The principles of industry orientation are discussed. Industry orientation which is suitable for the development of Shantou industry is analyzed. Six core industrial districts which are chemical raw materials, organic chemicals and polymers, fine chemicals, bio-chemicals, oil processing, and reserve bank of crude oil are built.


Wang Y.-J.,Hua Lu Engineering Technology Co. | Cui C.,Hua Lu Engineering Technology Co. | Wang Y.-A.,Hua Lu Engineering Technology Co.
Xiandai Huagong/Modern Chemical Industry | Year: 2013

During the next national Twelfth Five-Year Plan period, the development of industry will bring into focus on new chemical materials. The low self-sufficiency rate of new chemical materials and low scale of high-grade product attribute to the major obstacles such as slow development of industrialization, technology barriers difficult to break through, lack of engineering device platform for production, learning and research, lack of ways and foundations for independent research and development of high-grade products. The chemical material projects which have technical sources and prospects of industrialization are introduced. Several chemical materials such as organic fluorine and engineering plastic are shown to have large-scale industrialization conditions from various aspects such as upstream and downstream industries, consumption of raw materials, the industrial equipment, special technology, etc.


Wu Y.-Y.,Hualu Engineering & Technology Co. | Wu H.-X.,Hualu Engineering & Technology Co. | Qu Y.-L.,Hualu Engineering & Technology Co.
Huaxue Gongcheng/Chemical Engineering (China) | Year: 2015

The extractive distillation process in dividing-wall column of hydrogen chloride recycling in dilute hydrochloric acid was put forward and established. The simulation and optimization on the process were conducted by using Aspen Plus simulation software, with concentrated sulfuric acid as extractant. The optimization result is as follows: dividing-wall column theoretical plate number 42, feed stage 16, extractant feed stage 3, and reflux ratio 1.5. Under this condition, the simulation of extractive dividing wall column was carried out. On the premise of satisfying the requirements of separation, compared with conventional extractive distillation process, the reboiler duty of such process is reduced by 14.2% and condenser duty is reduced by 15.4%. The extractive distillation process in dividing-wall column can reduce energy consumption, thus saving the equipment investment and operation cost as well. © 2015, Editorial Office of Chemical Engineering (China). All right reserved.

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