Implantation System Brine Recover from Some Chemical Treatment Tanks in a Plant Chlor - Alkali

Amelec Viloria,Maria Andreina Moros

doi:10.17485/ijst/2016/v9i46/107368

Amelec Viloria, Maria Andreina Moros

Open Access

https://doi.org/10.17485/ijst/2016/v9i46/107368

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Abstract

Objectives: This study establishes aimed at recovering the brine flowing with sewage sludge to decrease the concentration of chlorides and reduce salt intake. Methods/Statistical Analysis: A piping system taking into account the characteristics of the sludge, which served as the basis for determining the loss of brine in the effluent, make the necessary calculations for the piping systems to develop and to transport the sludge from the point was raised unloading to the recovery site. considered the issue sis sizing based on the measurement of levels, distance the pipe section to place, make the hydraulic study and plans isometric system was developed. Findings: With the recovery of brine, it manages to reduce consumption of 7.11 tons of salt daily at the plant, leading to savings of 35,539.6 bolivars per year for salt intake. Application/Improvements: When recovering the drained brine the impact this causes for chlorine soda plant, the central plant effluent and receiving water body (Lake Maracaibo) is decreased.

Highlights

The production process of Chlor-Alkali part of the brine, a mixture of common salt (NaCl) and demineralized water, which occurs as a major chlorine products (Cl2), caustic soda (NaOH) and hydrogen (H2), and other sub products such as hydrochloric acid (HCl) and sodium hypochlorite (NaClO)
These precipitates accumulate within the tank forming a sludge, which are drained from time to time to remove it from the tanks and remove impurities, doing so loss of brine as effluent are generated with a high content of chlorides and sulphates falling freely drainage channel, increasing the concentration in the final effluent, and corrosion on the premises[4,5,6]
By uniting the flows of sludge generated in the two tanks a total flow of 21,516 m3/day with a concentration brine 0.6639 Kg, which is drained through both lines, resulting increase in chlorides and sulphates in is obtained final effluent affecting water bodies (Lake Maracaibo)

Summary

Introduction

The production process of Chlor-Alkali part of the brine, a mixture of common salt (NaCl) and demineralized water, which occurs as a major chlorine products (Cl2), caustic soda (NaOH) and hydrogen (H2), and other sub products such as hydrochloric acid (HCl) and sodium hypochlorite (NaClO). Plant Chlor-Alkali has area brine, in this one of the processes applied for the ultra-pure brine is chemical treatment, consisting of two tanks stirred reactors, where the brine with coagulating substances that allow the precipitation is of impurities present in the brine as they are calcium and magnesium[1,2,3] These precipitates accumulate within the tank forming a sludge, which are drained from time to time to remove it from the tanks and remove impurities, doing so loss of brine as effluent are generated with a high content of chlorides and sulphates falling freely drainage channel, increasing the concentration in the final effluent, and corrosion on the premises[4,5,6]. In order to avoid these problems a system allowing recovery process brine drained through the muds formed in tanks chemical treatment, in order to reduce the concentration of chlorides and sulphates arises, reduce costs salt and corrosion damage, and increase industrial profitability and optimize the overall process

Theoretical Foundation

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