Shanxi Water Conservancy Technical College

Yuncheng, China

Shanxi Water Conservancy Technical College

Yuncheng, China
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Liu M.,Nanjing Southeast University | Zhang X.,Taiyuan University of Technology | Zhang X.,Shanxi Water Conservancy Technical College | Zhao L.,Nanjing Southeast University
International Journal of Chemical Reactor Engineering | Year: 2017

Sewage sludge modified by Ca(OH)2 and Fe2(SO4)3 were used as make the slurry with petroleum coke, and changes in the size distribution and a total number of particles in the slurry were determined by Focused Beam Reflectance Measurement (FBRM) to explore the particles flocculation mechanism. In addition, the structural strength of petroleum coke sludge slurry (PCSS) was calculated by two mathematic models to illustrate the how the sludge improves the stability of PCSS. The results indicated that the absolute value of the Zeta potential of PCSS increased with the sludge addition and that PCSS stability improved. However, the absolute value of the Zeta potential decreased and the stability declined after the sludge was modified by Fe2(SO4)3 and Ca(OH)2. Petroleum coke particles were wrapped by sludge flocs, and small particles flocculated during their co-slurry process to form a spatial network structure, effectively prevented the settlement of petroleum coke particles and ultimately improved the stability of slurry. The calculation results obtained by the two mathematic models reveal that the shearing energy consumption per-unit-quality of PCSS using raw sludge is twice or thrice than that of PCWS. However, energy consumption was reduced after the sludge was modified by Fe2(SO4)3. © 2017 Walter de Gruyter GmbH, Berlin/Boston 2017.


Zhang X.-B.,Xi'an University of Technology | Zhang X.-B.,Shanxi Water Conservancy Technical College | Feng M.-Q.,Xi'an University of Technology | Sun X.-H.,Shanxi Water Conservancy Technical College | And 2 more authors.
Shuidonglixue Yanjiu yu Jinzhan/Chinese Journal of Hydrodynamics Ser. A | Year: 2014

The rheological properties of city dewatered sludge are the basic parameters of its pipeline process design, in this paper, by using a parallel plate rotary rheometer (AR2000) to study rheological properties of the sludge, varying the temperature and water content and using the Carreau-Bird model to fit and process the flow data of sludge. We have found that, at different moisture contents with the increase of shear rate, the sludge rheology transforms from the yield pseudoplastic fluid to Bingham fluid, the viscosity of sludge becomes smaller then exhibiting the phenomenon of shear thinning. The apparent viscosity is closely related to the transport of sludge and due to its low apparent viscosity, when moisture content is 72.67%-87.4%, the sludge is suitable for pumping; using Carreau-Bird model to fit sludge rheology curve is relatively good, zero-shear viscosity changes very large with temperature variation, and infinite shear viscosity changes slightly as moisture varies. The time constant appears the maximum when moisture content is near 67.41%, and it increases with the decrease of water content when moisture content is in the range of 81.3% to 87.4%, but it turns smaller with the decrease of water content when its moisture content is in the range of 63.65% to 67.41%.


Zhang X.-B.,Xi'an University of Technology | Zhang X.-B.,Shanxi Water Conservancy Technical College | Feng M.-Q.,Xi'an University of Technology | Sun X.-H.,Shanxi Water Conservancy Technical College | And 2 more authors.
Shuidonglixue Yanjiu yu Jinzhan/Chinese Journal of Hydrodynamics Ser. A | Year: 2013

In order to study the influencing factors of the city dewatered sludge when wall slip happens, this paper takes experimental analysis on sludge (water content 81.3%) wall slip phenomena using the parallel plate rotational rheometer (AR2000) at room temperature and by means of high speed camera. The results are found, when sludge is dynamically sheared, slid phenomenon happens in a certain period of time. And the shear rate sweep curve with the rate increasing shows some viscoelastic. At the same time, scanning strain in three cases that the corner frequencies are low frequency 0.5 rad/s, medium frequency 6.28 rad/s and high frequency 12.56 rad/s, the various effects of wall slip on force including the total shear stress, elastic stress, viscous stress are analyzed, it is decomposed according to the stress proposed by Cho et al.[13]. It is found that there is a dimensionless parameter τ′/|G*|, the ratio of elastic stress and the complex modulus in linear region between 0.21-0.27, and this parameter decreases slowly with increasing the corner frequency, which showed that time has some effect on sludge wall slip and the elastic stress plays the main role.


Yang J.,Xi'an University of Technology | Feng M.,Xi'an University of Technology | Bai J.,Xi'an University of Technology | Bai J.,Shanxi Water Conservancy Technical College | Zhang L.,Xi'an University of Technology
2011 International Conference on Computer and Management, CAMAN 2011 | Year: 2011

In the paper, some relative research theory and calculation methods for the river ecological basic flow both at home and abroad have been summed up, and then, considering the actual conditions of Sushui River, the function of the river reach is determined. The ecological basic flow of the river in different periods has been quantitatively researched with Tennant and the minimum monthly average flow methods. Further more, the degree of ecological water shortage was analyzed, and for the three representative years (P=50%, P=75%, P=95%) the water shortage for the ecological basic flow in turn is 0.722×10 6∼0.729×106m3, 0.135×10 6∼0.279×106m3 and 0.335×10 6∼0.407×106m3. It is expected to provide a scientific basis for the reasonable allocation of water resources in Sushui River. ©2011 IEEE.


Bai J.-Z.,Xi'an University of Technology | Bai J.-Z.,Shanxi Water Conservancy Technical College | Yang J.-M.,Xi'an University of Technology | Yang J.-M.,Shanxi Water Conservancy Technical College | And 2 more authors.
Advanced Materials Research | Year: 2012

In order to know the environmental capacity, improve the continual deterioration of the water quality in Sushui River, and promote the harmonious development of economy and aquatic environment, we did the following research. Based on the 1-D steady-state water quality model, the outfalls are generalized, and then we derived the formula for calculating water environmental capacity of each reach. According to the information of water quality, hydrology data and the discharge distribution of the river, we chose COD, ammonia nitrogen and volatile phenol as the main control factors, and some formulas were used to calculate the water environmental capacity of COD, ammonia nitrogen and volatile phenol. From which we got that annual water environmental capacity of COD, ammonia nitrogen and volatile phenol on the studied reach respectively arrive at 1257.897∼1420.928t, 17.873∼26.025t and 1.750∼2.871t under different design terms. It is serious pollution in the Sushui River, combined with the status quo emissions, we found that under different design terms, the annual quantity of pollutants reduction of COD, ammonia nitrogen and volatile phenol arrive at 30.36×10 6t, 3.257×10 6t and 0.1745×10 6t. © (2012) Trans Tech Publications, Switzerland.


Zhang X.-B.,Xi'an University of Technology | Zhang X.-B.,Shanxi Water Conservancy Technical College | Zhang L.,Xi'an University of Technology | Feng M.-Q.,Xi'an University of Technology | Tang H.,City University of New York
2011 International Conference on Computer and Management, CAMAN 2011 | Year: 2011

Wall slip behavior of sludge was studied experimentally by using a rotational rhehometer with parallel plate fixtures and checking the possible influence factors on sludge wall slip based on the gap dependence of the stress/strain data. In the steady shearing flow it was found that there seems to be no critical shear stress for the onset of slip of sludge, while concentration is the important influence factor to sludge wall slip. In the oscillatory shear flow experiments, we analyze the total wave. While strain γ0 = 0.68, stress amplitude decreases with the time, while strain γ0 = 0.1, the stress amplitude remains constant. The stress sweep under the three gaps was done on the sludge of different angular frequency and temperature. In the previous stage, shear stress coincides better under the different angular frequency in the linear region and nonlinear region, somewhere in the nonlinear area it appears bifurcation, but the shear stress and strain are not constant in the bifurcation point. In a certain temperature range, gap dependence occurs, but the bifurcation point is almost same. It indicates that the wall slip relates to strain, angular frequency and other factor, the temperature of its impact is negligible. ©2011 IEEE.


Li X.,Taiyuan University of Technology | Li X.,Shanxi Water Conservancy Technical College | Fan G.,Taiyuan University of Technology
Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery | Year: 2010

On the basis of the non-sufficient and sufficient water supplied infiltration test of homogenous soil, the infiltration processes for both non-sufficient and sufficient water supplies were analyzed; the correlations of Kostiakov three model parameters for the non-sufficient and sufficient water supplies were established. The result shows that the ponding infiltration process with non-sufficient water supply accords with asymptotic curve of infiltration process with sufficient water supply; the infiltration parameter ratio m increases as the three elements of water supply, namely, intensity, clay content of soil grain and soil bulk density augment, while the parameter ratio m decreases as the two elements of sand content, and moisture content, the steady infiltration rate of non-sufficient water supply equals to steady infiltration rate of sufficient water supply; the infiltration coefficient K1 of non-sufficient water supply equals to the value of the difference between water supplied intensity of water supply and steady infiltration rate.


Li Z.,Shanxi Water Conservancy Technical College
2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 - Proceedings | Year: 2011

In order to know the environmental capacity, prevent the continual deterioration of the water quality of Fen River, and promote the harmonious development of economy and aquatic environment, the formula for calculating water environmental capacity of each reach was derived from generalizing the outfall based on the 1-D steady state water quality model. In accordance with the existing specials of water quality and hydrology data and the discharge distribution of the Fen River, the COD and NH3-N were selected as the main control factors of pollution which are the largest share of pollutants. The capacity of COD and NH3-N were studied for the average flow of the river at driest month under a different guaranteed rate from 1994 to 2006. The studies of this paper provide a scientific basis for resources protection and management of Fen River. © 2011 IEEE.

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