Using Catalyst and Electrolysis Diaphragm Method to Produce Multiple Oxidants to Remove the Scaling and Slime in Cooling System

2008 ◽  
Vol 47-50 ◽  
pp. 339-342
Author(s):  
Kuo Shan Yao ◽  
Chen Yu Chang ◽  
Ta Chih Cheng ◽  
Yung Hsu Hsieh ◽  
Shi Ren Weng
Keyword(s):  
Chlorine Dioxide ◽  
High Efficiency ◽  
Ph Value ◽  
Cooling System ◽  
Water System ◽  
Cooling Water ◽  
Magnesium Carbonate ◽  
Pipeline System ◽  
Circulating Water ◽  
Multiple Oxidants

Increasing cycle of water circulation in industrial cooling water system caused accumulation of dissolving materials in circulating water. Subsequently, the problems including scaling, fouling, corrosion and slime occurred. The multiple oxidants including chlorine dioxide, ozone, peroxide hydrogen, and chlorine were prepared using diaphragm electrolysis method to alleviate the problems above in the cooling system. Meanwhile multiple oxidants can also inhibit the accumulation of biological dirt and erosion effectively. The efficiency of multiple oxidants to inhibit precipitation of magnesium carbonate and calcium carbonate can be increased by adjustment of pH value in the whole pipeline system to reduce corrosion rate of the pipeline and to achieve energy-water saving goal. The results showed that the high efficiency of chlorine dioxide mixture was an excellent bio-corrosion inhibitor and bio-accumulation bactericide. The residue concentration of mixture oxidants are at the range of 0.05 ~ 0.25 mg ClO2/L that is high enough to restrain the growth of micro-organisms.

scholarly journals Heuristic Framework for Sustainable Cooling Water Systems Operations in Oil Facilities

2021 ◽  
Vol 15 ◽  
pp. 1-16
Author(s):  
Mustafa Hashim ◽  
Mimi Haryani Hassim ◽  
Denny KS Ng ◽  
Denny KS Ng
Keyword(s):  
High Efficiency ◽  
Cooling System ◽  
Water System ◽  
Cooling Water ◽  
Water Systems ◽  
Design Stage ◽  
Project Schedule ◽  
Residential Areas ◽  
Oil Companies ◽  
Cooling Water System

To meet the growing demand for cleaner environment from the society, most leading oil companies have committed to preserve environment via reduction of greenhouse gases, water and soil pollution as well as the use of natural resources. In most of the oil facilities, they required massive cooling systems to cool down process streams in order to meet the process requirements. The most common cooling system in oil facilities is evaporative cooling water system (ECWS) as such system has high efficiency. Cooling water is commonly used in offices and residential areas. However, the cooling water system is one of the utility systems that generates high environmental impacts due to high consumption of power, water and chemicals. Therefore, it is important to optimize the system in the early design stage of the project to operate in the most effective and efficient condition. In reality, many efforts may be missed out due to loose project definition, inexperience design engineer, hectic project schedule, or resource constraint. Therefore, in order to overcome the previous limitations, this paper presents a comprehensive heuristic improvement framework for cooling water systems in oil operating facilities.

Resistance Mechanism of Microbial Fouling in Circulating Water to Bactericide

2011 ◽  
Vol 347-353 ◽  
pp. 931-936
Author(s):  
Mo Jie Sun ◽  
Hong Dan Shi ◽  
Sheng Zheng
Keyword(s):  
Resistance Mechanism ◽  
Water System ◽  
Cooling Water ◽  
Resistance Mechanisms ◽  
Sulfate Reducing ◽  
Circulating Water ◽  
Plant Uses ◽  
Reducing Bacteria ◽  
Great Harm

Microorganisms in circulating water of power plant bring great harm to cooling water system. It not only affects the effect of heat transfer, but also would lead to corrosion of heat exchanger, in seriously would result in shutdown. Now the plant uses the bactericide to treat with the microbial fouling generally, and a variety of fungicides have been developed. However, the long-term usage of fungicide will make the bacteria appear resistance, which greatly limits the application of such measures. This paper overviewed different resistance mechanisms of Pseudomonas, sulfate-reducing bacteria, iron bacteria and slime forming bacteria in the microbial fouling to bactericide and put forward some solutions.

Biocide Screening of Secondary Effluent of Sewage Treatment Plant directly Reused in Power Plant Circulating Cooling Water System and the Study on its Properties

2012 ◽  
Vol 229-231 ◽  
pp. 2510-2513
Author(s):  
Wen Qiu ◽  
Pei Yao Xu ◽  
Xiao Bei Dong ◽  
Fan Zhang
Keyword(s):  
Chlorine Dioxide ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Dynamic Test ◽  
Water System ◽  
Cooling Water ◽  
Optimum Concentration ◽  
Secondary Effluent ◽  
Static Test ◽  
Complex Formulation

In this paper, three biocides with different mechanism were chosen to carry static test on screening from single formulation to complex formulation and bactericidal properties. The results showed that the most bactericidal biocide was isothiazolone, and the last was steady chlorine dioxide. The optimum concentration of three biocides in single formulation were isothiazolone10 mg/L, quarternary amine salt 20 mg/L and steady chlorine dioxide 20 mg/L separately. As the best complex formulation, P with optimum concentration of isothiazolone5 mg/L and steady chlorine dioxide10 mg/L, was verified as harmless for environment and also effective inhibition growth of microorganism by dynamic test.

Cooling System Design of Ion Nitriding and PCVD Composite Treatment Furnace

2013 ◽  
Vol 448-453 ◽  
pp. 3462-3466
Author(s):  
Z.J. Zuo ◽  
Si Bi ◽  
L.R. Fu ◽  
Z.Q. Weng ◽  
S.H. Peng
Keyword(s):  
System Design ◽  
Cooling System ◽  
Plasma Nitriding ◽  
Water System ◽  
Cooling Water ◽  
Vacuum System ◽  
Vacuum Furnace ◽  
Ion Nitriding ◽  
Precise Calculation ◽  
Nitriding Furnace

Keywords: ion nitriding furnace cooling system vacuum system Abstract. About fuction of vacuum plasma nitriding furnace cooling system, and its design and calculation of main parts, in particular control of water consumption. The cooling water system have been set into the water flowing through the four heat shield, and gradually take the heat, then the coolant out by outlet pipe. Cooling water flows through layers of insulation to varying degrees of cooling, to ensure that each level of temperature, precise calculation of water flow can only be guaranteed to ensure the maximum water savings and cooling the furnace down. This article provide the basis for vacuum furnace cooling system design in the future.

Analog Computer Solution of a Complex Transient-Hydraulic Problem in the Power Industry

1961 ◽  
Vol 83 (3) ◽  
pp. 433-442 ◽  
Author(s):  
E. H. Taylor ◽  
A. Reisman ◽  
E. C. Deland ◽  
H. H. Baudistel
Keyword(s):  
Los Angeles ◽  
Nonlinear Differential Equations ◽  
Water System ◽  
Cooling Water ◽  
Analog Computer ◽  
Computer Solution ◽  
Steam Power ◽  
Circulating Water ◽  
Circulating Water System ◽  
The City

The Scattergood Steam Power Plant of the City of Los Angeles uses Pacific Ocean water as a heat sink. During the design of the circulating water system which conveys the ocean cooling water to the condensers, it was necessary to predict the hydraulic behavior under certain unsteady conditions in order to establish design criteria. This article describes the circulating water system, the problems to be solved, the methods of mathematical analysis, and the analog computer solution of the resulting set of 28 simultaneous nonlinear differential equations.

Experimental Research on the Effect of Cross-Wind to Wet-Cooling Tower Performance

2013 ◽  
Vol 860-863 ◽  
pp. 1412-1415
Author(s):  
Qing Yang Wang ◽  
Tian Yu Sun ◽  
Jian Zhang ◽  
Jian Xing Ren
Keyword(s):  
Wind Velocity ◽  
Flow Rate ◽  
Temperature Difference ◽  
Cooling Tower ◽  
Thermal Power ◽  
Water System ◽  
Cooling Water ◽  
Cooling Capacity ◽  
Inlet Temperature ◽  
Circulating Water

Environmental cross-wind has a influence on cooling capacity of wet cooling tower to a great extent in power plant.The variation of circulating-water temperature difference (Δt) and cooling coefficient of efficiency(η) with cross-wind velocity, circulating water inlet temperature and flow rate, are shown under cross-wind conditions, compared with cases without wind. By using experimental platform of cooling water system based on 300MW thermal power unit,it is found that with cross-wind velocity increasing,cooling temperature difference and cooling efficiency decrease first then increase at the knee point when the velocity value is 0.8m/s. In addition, the correlation betweenΔt ,η and parameters,such as circulating-water inlet temperature and flow rate, is derived for cases with windless conditions.

Structural Modification of a Power Plant’s River Water Intake to Minimize Ice Blockage

2013 ◽  
Author(s):  
Frank Michell ◽  
Marcela Politano ◽  
Jeffrey Stallings ◽  
Yushi Wang
Keyword(s):  
Water Intake ◽  
Cooling System ◽  
Numerical Study ◽  
Water System ◽  
Warm Water ◽  
Mitigation Measures ◽  
Second Phase ◽  
Sediment Control ◽  
Circulating Water ◽  
Ice Accumulation

Ice blockage of a power plant’s water intake is of paramount importance since it can lead to an unplanned shutdown of the intake compromising water supply and plant operation. American Electric Power’s (AEP) Conesville Power Plant historically controlled ice accumulation at the river intake by routing to the intake a portion of the warm water return from the condenser on the only operating “once-through” unit’s circulating water system. The unit operating with this once-through cooling system was retired at the end of 2012; thus, the plant lost the use of the condenser outlet/warm water return deicing flow at the river intake. A numerical study was conducted to evaluate design alternatives to alleviate ice accumulation at the river intake. A numerical model to predict the ice transport and accumulation at the river intake was developed and used to understand the main phenomenon leading to intake blockage. The effectiveness of mitigation measures was evaluated with the model. A mitigation plan consisting of intake modifications to be implemented during several phases is presented. In the first phase, large pipe openings are cut in the walls separating intake pump wells of previously retired units at the facility. In the second phase, a number of sediment control vanes previously placed in front of the intake are removed to facilitate downstream ice transport. A third phase, if needed to be implemented, involves removing additional sedimentation control vanes and cutting holes in the pump wells on the operating units. The paper describes the model, discusses numerical results and presents the field experience after implementation of phase one.

scholarly journals Study on association solubilization and inhibition of scale in recirculating cooling water system under S-HGMF

2021 ◽  
Author(s):  
Xin Zhao ◽  
Suqin Li ◽  
Shuaishuai Han ◽  
Jianjiang Jin ◽  
Peng Zhang
Keyword(s):  
Surface Tension ◽  
Water System ◽  
Cooling Water ◽  
Crystal Form ◽  
Magnetic Flux Density ◽  
Form Change ◽  
Circulating Water ◽  
Cooling Water System ◽  
Scale Inhibition ◽  
Change Of Scale

Abstract The present study conducted an investigation on the effect of Superconducting-High Gradient Magnetic Field (S-HGMF) in the association solubilization of recirculating cooling water and the crystal form change of scale. The effects of magnetic flux density, flow rate and cycle-index on the solubility of scale-forming ions were investigated, and the effects of viscosity and surface tension on the molecular internal energy and order degree of circulating water were analyzed. The scale was ground and mixed with water and placed in a S-HGMF system to study the effect of S-HGMF on the crystal form change of CaCO3. The experimental results showed us that S-HGMF could increase the solubility of scale-forming ions. It could enhance the interaction between water molecules by increasing viscosity and reducing surface tension, so as to improve the stability of water quality, reduce ion precipitation, and achieve the effect of scale inhibition. At the same time, it could also change the crystal structure of CaCO3, promote the transformation of calcite to aragonite, and realize the purpose of scale inhibition. In a word, S-HGMF treatment can effectively solve the scaling problem of recirculating cooling water system, which provides a reference for scale inhibition of recirculating cooling water.

scholarly journals Research and Analysis of Cooling System for Diesel Locomotive

2018 ◽  
Vol 1 (1) ◽  
Author(s):  
Wenbin Qiu
Keyword(s):  
System Design ◽  
Heat Dissipation ◽  
Cooling System ◽  
Design Method ◽  
High Reliability ◽  
Water System ◽  
Cooling Water ◽  
Diesel Locomotive ◽  
System Pressure ◽  
Conventional Cooling

With the continuous development of diesel locomotives in the direction of single power, the heat dissipation ofthe locomotive cooling system is getting bigger and bigger, and its performance directly affects the economy andreliability of the locomotive. Due to the limitation of locomotive axle load and structural space size, there is a greattechnical problem between the cooling system design and the arrangement of the cooling device and the overalllayout of the locomotive. The increase in the number of radiators, making the number of cooling system processesare correspondingly increased, resulting in locomotive cooling system water resistance and water system pressure aregreatly improved. The traditional cooling system form and the radiator structure are diffi cult to meet the developmentrequirements of high power locomotive. Based on the conventional cooling system design method, a multi-processradiator is proposed. The multi-process cooling system has the advantages of high cooling effi ciency, simple structure,small auxiliary power consumption of the pump and high reliability of the cooling system components. In this paper,the cooling system and its function, the existing cooling technology and the multi-process radiator are studied andanalyzed, and the three-process radiator and the single-process radiator are tested and compared. In this paper, a newmulti-process radiator structure scheme is proposed for the design requirements of CKD9 diesel locomotive coolingsystem. The program eff ectively uses the radiator cooling water and cooling air temperature diff erence, to achieve thepurpose of increasing heat dissipation.

Boiler Flue Gas Treatment of Cooling Water Circulation Device Control System Based on PLC

2014 ◽  
Vol 598 ◽  
pp. 587-590
Author(s):  
Qiu Ping Wang ◽  
Lei Han ◽  
Miao Zhang ◽  
Feng Li
Keyword(s):  
Control System ◽  
Sulfuric Acid ◽  
Flue Gas ◽  
Ph Value ◽  
Cooling Water ◽  
Water Circulation ◽  
Gas Treatment ◽  
Circulating Water ◽  
Dilute Sulfuric Acid ◽  
Flue Gas Treatment

Boiler flue gas treatment of cooling water circulation device is a device which can produce dilute sulfuric acid by absorbing SO2 in the flue gas of boiler combustion and add dilute sulfuric acid to the circulating water. Adding dilute sulfuric acid to the circulating water, can reduce pH value of the thermal power plant cooling water, obstacles and reduce the condenser fouling. This paper has introduced the working process of the boiler flue gas treatment of cooling water circulation device and the design method of the control system based on SIEMENS S7-300 series PLC. The control system realizes data acquisition of the water level and the pH value, and control the operation of each equipment according to the collected data. Finally realized the purpose of producing dilute sulfuric acid.

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